The invention provides a cleaning device of a pumping machine. The cleaning device comprises a base body (10), a filtering part (20) and a water outlet pipe (30). The base body (10) comprises a water inlet (11) and a water outlet (12), and the water inlet (11) is connected with a pumping system (1) of the pumping machine. The filtering part (20) is arranged at the water inlet (11). The first end of the water outlet pipe (30) is connected with the water outlet (12). According to the technical scheme, the problems that in the prior art, the requirement of a cleaning device for the rotating speed of an engine of a pumping machine is high, oil consumption is high, and the utilization rate of kinetic energy is low can be effectively solved.