Cleaning pump with gun closing and stopping functions

The utility model belongs to the technical field of cleaning machines, and particularly relates to a cleaning pump with a gun closing shutdown function, which comprises a pump body and a motor connected with the pump body, a water inlet connector and a water outlet connector used for being externally connected with a spray gun are installed on the pump body, and a water inlet channel, a water outlet channel and a backflow channel are formed in the pump body. The two ends of the backflow channel communicate with the water inlet channel and the water outlet channel correspondingly, an overflow valve assembly is installed in the backflow channel, a microswitch assembly used for turning off a power source is arranged on one side of the overflow valve assembly, and a valve rod used for controlling the microswitch assembly is movably arranged in the overflow valve assembly. Liquid in the water outlet channel enters the backflow channel, the valve rod moves to trigger the microswitch assembly, a power source is turn