The utility model relates to a photovoltaic water lift system is driped irrigation in one set of land for growing field crops mainly includes solar photovoltaic board, on -off controller, interchange water pump, output dc -to -ac converter, once -through water pump, MPPT controller and battery, the solar photovoltaic board passes through the cable and is connected with other subassemblies, the solar photovoltaic board is connected with on -off controller, on -off controller cut -offs according to illumination intensity control scheme's, on -off controller while and output dc -to -ac converter, MPPT controller and battery are connected, the output dc -to -ac converter is connected with the interchange water pump, the output dc -to -ac converter provides alternating current power supply for exchanging the water pump, the MPPT controller is connected with the once -through water pump, the MPPT controller improves accumulator output power, this practical design's water lift system improves water lift efficiency, easy operation is convenient simultaneously.