Water seepage testing device for outer wall of building

The utility model relates to the technical field of water seepage testing devices, and discloses a building exterior wall water seepage testing device, which comprises a device main body, the device main body comprises a mounting rack, four corners of the mounting rack are respectively provided with a suction cup, and the tail end of each suction cup is connected with a negative pressure suction pipe. Through the arrangement of the mounting rack, the suction cup, the negative pressure suction pipe, the mounting base, the screw rod body, the driving motor, the threaded sleeve, the mounting assembly and the spraying water pipe, in the actual use, the device can be placed on a wall surface needing to be tested, air in the suction cup is pumped out through the air pump and the negative pressure suction pipe, negative pressure is formed, and the device can be used for testing the wall surface. The device is adsorbed on the wall surface, then the spraying water pipe is installed and fixed through the installation a