diff --git a/docs/developer-guide/operators.md b/docs/developer-guide/operators.md
index b0975ee4687..f1fefc4a9ea 100644
--- a/docs/developer-guide/operators.md
+++ b/docs/developer-guide/operators.md
@@ -64,6 +64,7 @@
 * [Power](#power)
 * [PReLU](#prelu)
 * [Quantize](#quantize)
+* [Range](#range)
 * [Reduction](#reduction)
 * [ReLU](#relu)
 * [Reorg](#reorg)
@@ -1518,6 +1519,11 @@ y = float2int8(x * scale)
 | ------------- | ----- | --------------------- |
 | scale_data    | float | [scale_data_size]     |
 
+# Range
+```
+y = range(x, limit, delta)
+```
+
 # Reduction
 ```
 y = reduce_op(x * coeff)