Wall hidden crack detection device for building detection

The utility model belongs to the technical field of building detection, in particular to a wall hidden crack detection device for building detection, which comprises a base and an ultrasonic detection device body, the base is provided with a movable fixed switching assembly, the top of the base is fixedly connected with a mounting frame, a lifting plate is slidably arranged in the mounting frame, and the lifting plate is fixedly connected with the ultrasonic detection device body. A height adjusting assembly is arranged between the lifting plate and the mounting frame, and a front-back position adjusting assembly is arranged between the lifting plate and the ultrasonic detection device body. The ultrasonic detection device is reasonable in structural design, through the arrangement of the movable and fixed switching assembly, the device is convenient to move, meanwhile, the device is convenient to lock after being moved, the stability of the device is guaranteed, the situation that the detection accuracy is i