The utility model discloses a pointer type wind-power flange end face nondestructive testing device comprising a central rotary shaft and a first cross beam, wherein the first cross beam is articulated with the central rotary shaft, a lifting air cylinder is articularted between the first cross beam and the central rotary shaft, the first cross beam is articulated with a travelling trolley, a probe module is arranged at the bottom of the travelling trolley and comprises a guide rail, a lead screw and a sliding block, the guide rail is fixedly arranged on the travelling trolley, the lead screw is rotatably arranged on the travelling trolley, the sliding block slides on the guide rail and is provided with a screw hole, the screw hole is matched with the lead screw, an ultrasonic probe is fixedly arranged at the bottom of the sliding block and connected with an ultrasonic detector, the lead screw is controlled by a second stepping motor to rotate, a first stepping motor and the second stepping motor are respectively connected with the controller, the controller comprises a single chip microcomputer and a stepping motor driver, and the two sides of the travelling trolley are respectively provided with a smooth travelling mechanism. The pointer type wind-power flange end face nondestructive testing device has the advantages of convenience in detection and improved detection efficiency.