Abstract: A fast detection circuit was designed using CMOS digital integrated circuits, which included four parts:pulse generation circuit, automatic scanning circuit, status indication circuit, and self check control.Based on the circuit, a detection device was developed to detect the short circuit, disconnection of cable conductors and wire sequence of a new type of heliostat pushrod cable module.The method is easy to implement with simple circuit and high detection efficiency.It can also be used for the detection of other similar cable module.