The utility model discloses an adjust combustion engine compressor blade cleaning equipment who washs water pump outlet pressure, including wasing the water tank, wasing the water pump, wasing water flow rate regulation valve and cleaning head subassembly, it is connected to the cleaning head subassembly through wasing the water pipe way through wasing the water pump, wasing water flow rate regulation valve to wash the water tank, wasing the water pump export and wasing and install the constant voltage modulation valve between the water tank return water entry. The utility model discloses can make the washing water pump move in stable operating mode the loss that reduces to wash the water pump, lower energy consumption with wasing the value that it is suitable that water pump outlet pressure adjusts always. Also can adjust the set pressure of constant voltage modulation valve according to the needs of water supply pressure.