Filter pressure maintaining inspection device

The utility model provides a pressure maintaining inspection device for a filter. The filter pressure maintaining inspection device comprises a bottom plate, a placement table is arranged at the top of the bottom plate, a circular ring is fixedly installed at the top of the placement table, a water tank and a placement groove are formed in the placement table, the placement groove is located in the water tank, a fixing frame is fixedly installed at the top of the bottom plate, a rectangular sliding plate is installed on the fixing frame in a sliding mode, and the rectangular sliding plate is fixedly installed on the bottom plate. A sealing cover is fixedly installed at the bottom of the rectangular sliding plate, a booster pump is fixedly installed on the fixing frame, a first long hose is fixedly connected to a water outlet of the booster pump, and a first hard pipe is fixedly connected to the end, away from the booster pump, of the first long hose. The filter pressure maintaining inspection device provided