Device for testing air tightness of floor drain

The utility model discloses a device for testing the air tightness of a floor drain. The device comprises a frame body, a pool body, the floor drain and an air tightness detection assembly, the frame body comprises a rectangular bearing platform, a first hole is formed in the bearing platform, and a baffle is arranged on the edge of the upper end face of the bearing platform. Supporting legs are arranged on the lower end surfaces of four corners of the bearing platform; the tank body is provided with an upward opening and is arranged on the bearing platform; the bottom of the pool body is provided with a second hole and a floor drain; the air tightness detection assembly is arranged at the bottom of the floor drain and comprises a pressure pipe, a pressure detection device and a pressure control device; the pressure pipe comprises a vertical pipe and a branch pipe, the top of the vertical pipe is connected with the floor drain through a movable joint, and a pressure valve and a pressure control device are arr