Waterproof membrane thickness detection device

The invention relates to the field of ultrasonic detection, and discloses a waterproof membrane thickness detection device, which comprises an ultrasonic thickness detection probe, and further comprises a cylindrical probe fixing module. The ultrasonic thickness detection probe comprises a detection terminal and a top cover arranged at the end of the detection terminal; the probe fixing module isprovided with a groove; a floating unit is installed in the groove; a first hole is opened in the top of the probe fixing module; a second hole is opened in the center of the floating unit; the detection terminal sequentially passes through the first hole and the second hole until the top end protrudes from the floating unit; a screw hole perpendicular to the detection terminal is opened in the side wall of the floating unit; and a nail screw is mounted on the screw hole to resist the detection terminal. According to the waterproof membrane thickness detection device, the probe can be placed accurately and smoothly, w