diff --git a/Cargo.lock b/Cargo.lock
index 0bcdab28..17df1a8d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1160,7 +1160,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_builtins"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "chrono",
  "fast-float",
@@ -1185,7 +1185,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_bytecode"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "num-bigint",
  "oxide_log",
@@ -1193,7 +1193,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_cfg"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "oxide_bytecode",
  "oxide_emit",
@@ -1204,7 +1204,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_cli"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "ansi_term",
  "bumpalo",
@@ -1228,7 +1228,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_code_cache"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "lru",
  "oxide_bytecode",
@@ -1237,7 +1237,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_compiler"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1258,7 +1258,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_dce"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1272,7 +1272,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_emit"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "num-bigint",
  "oxc_allocator",
@@ -1288,7 +1288,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_engine"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "oxide_bytecode",
  "oxide_compiler",
@@ -1300,7 +1300,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_fold"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "num-bigint",
  "oxide_bytecode",
@@ -1312,7 +1312,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_ir"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "oxide_bytecode",
  "oxide_log",
@@ -1321,7 +1321,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_kernel"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "bumpalo",
  "dashmap",
@@ -1335,7 +1335,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_liveness"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1347,7 +1347,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_log"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "tracing",
  "tracing-appender",
@@ -1356,11 +1356,11 @@ dependencies = [
 
 [[package]]
 name = "oxide_net"
-version = "0.19.19"
+version = "0.19.20"
 
 [[package]]
 name = "oxide_parser"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "oxc_allocator",
  "oxc_ast",
@@ -1375,7 +1375,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_regalloc"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1391,7 +1391,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_runtime_api"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "num-bigint",
  "num-traits",
@@ -1404,7 +1404,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_test262"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "oxide_bytecode",
  "oxide_compiler",
@@ -1424,7 +1424,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_types"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "bumpalo",
  "dashmap",
@@ -1437,7 +1437,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_vm"
-version = "0.19.19"
+version = "0.19.20"
 dependencies = [
  "bumpalo",
  "chrono",
diff --git a/Cargo.toml b/Cargo.toml
index 84cf83a6..7b7e45e4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.19.19"
+version = "0.19.20"
 edition = "2021"
 license = "MIT"
 rust-version = "1.80"
diff --git a/crates/oxide_builtins/src/temporal/duration.rs b/crates/oxide_builtins/src/temporal/duration.rs
index c2d20f07..a8ca6d53 100644
--- a/crates/oxide_builtins/src/temporal/duration.rs
+++ b/crates/oxide_builtins/src/temporal/duration.rs
@@ -1,7 +1,7 @@
 //! Temporal.Duration：ISO 字符串与 property bag 解析、构造、getter、total/round、
 //! 加减比较与格式化。
 
-use oxide_runtime_api::{to_number, to_string, NativeResult, ProtoKind, VmHost};
+use oxide_runtime_api::{to_number, to_number_full, to_string, NativeResult, ProtoKind, VmHost};
 use oxide_types::object::JsObject;
 use oxide_types::value::JsValue;
 
@@ -264,6 +264,18 @@ pub(crate) fn duration_like_values<H: VmHost>(vm: &mut H, val: JsValue) -> Resul
 }
 
 /// `Temporal.Duration` 构造器，保存十个整数时长分量。
+///
+/// # 步骤
+/// 1. 校验构造调用（非 `new` 形态抛 TypeError）。
+/// 2. 按年、月、周、日、时、分、秒、毫秒、微秒、纳秒顺序逐字段转换：
+///    undefined 视为 0；BigInt 抛 TypeError；其余经完整 ToNumber
+///    （对象走 valueOf 路径，Symbol 抛 TypeError）；NaN、非整数、
+///    非有限值抛 RangeError。
+/// 3. 共享校验器做符号一致性与范围检查。
+///
+/// # 注意事项
+/// 零分量归一为 +0：规范经整数往返（取整再还原为 Number），
+/// 传入 −0 时 getter 仍返回 +0。
 pub fn duration_constructor<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
     let ctor_proto = vm.builtin_proto(ProtoKind::DurationProto);
     if !is_ctor_call(vm, args, ctor_proto) {
@@ -277,11 +289,22 @@ pub fn duration_constructor<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult
         if args.len() <= index + 1 {
             continue;
         }
-        let number = to_number(vm.reg(args[index + 1]));
+        let arg = vm.reg(args[index + 1]);
+        if arg.is_undefined() {
+            continue;
+        }
+        if arg.is_bigint() {
+            return NativeResult::Err(crate::error::create_type_error(vm, "cannot convert duration field to number"));
+        }
+        let number = match to_number_full(arg, vm) {
+            Ok(value) => value,
+            Err(error) => return NativeResult::Err(native_engine_error(vm, &error)),
+        };
         if !number.is_finite() || number.fract() != 0.0 {
             return NativeResult::Err(crate::error::create_range_error(vm, "invalid duration"));
         }
-        *value = number;
+        // 零分量归一为 +0：规范整数往返（取整再还原 Number）使 −0 落为 +0。
+        *value = if number == 0.0 { 0.0 } else { number };
     }
     native_try!(validate_duration_values(vm, &values));
     initialize_temporal_receiver(vm, args, JsObject::OBJ_TYPE_DURATION, values.map(JsValue::float))
diff --git a/crates/oxide_vm/tests/builtins_temporal_tests.rs b/crates/oxide_vm/tests/builtins_temporal_tests.rs
index 46552ce2..8861144d 100644
--- a/crates/oxide_vm/tests/builtins_temporal_tests.rs
+++ b/crates/oxide_vm/tests/builtins_temporal_tests.rs
@@ -574,6 +574,32 @@ fn duration_constructor_exposes_components() {
     assert_eq!(str_val(&vm, r), "P1Y2M3W4D");
 }
 
+#[test]
+fn duration_constructor_coerces_fields_per_spec() {
+    let mut vm = Vm::new();
+    // undefined 分量视为 0
+    let r = eval(&mut vm, "new Temporal.Duration(undefined).toString()").unwrap();
+    assert_eq!(str_val(&vm, r), "PT0S");
+    let r = eval(&mut vm, "new Temporal.Duration(1, undefined).toString()").unwrap();
+    assert_eq!(str_val(&vm, r), "P1Y");
+    // Symbol 与 BigInt 抛 TypeError
+    let r = eval(&mut vm, "try { new Temporal.Duration(Symbol()) } catch (e) { e.constructor.name }").unwrap();
+    assert_eq!(str_val(&vm, r), "TypeError");
+    let r = eval(&mut vm, "try { new Temporal.Duration(0n) } catch (e) { e.constructor.name }").unwrap();
+    assert_eq!(str_val(&vm, r), "TypeError");
+    // 对象经 valueOf 转换
+    assert_eq!(num(&mut vm, "new Temporal.Duration({valueOf(){return 1}}).years"), 1.0);
+    // ±Infinity 抛 RangeError
+    let r = eval(&mut vm, "try { new Temporal.Duration(Infinity) } catch (e) { e.constructor.name }").unwrap();
+    assert_eq!(str_val(&vm, r), "RangeError");
+    let r = eval(&mut vm, "try { new Temporal.Duration(-Infinity) } catch (e) { e.constructor.name }").unwrap();
+    assert_eq!(str_val(&vm, r), "RangeError");
+    // 传入 −0 时 getter 返回 +0（整数往返归一）
+    assert!(eval(&mut vm, "Object.is(new Temporal.Duration(-0).years, 0)")
+        .unwrap()
+        .as_bool());
+}
+
 #[test]
 fn duration_from_validates_property_bags_and_preserves_precision() {
     let mut vm = Vm::new();