Distribution valve group, lifter and tractor

The utility model relates to a distribution valve group, a lifter and a tractor, the distribution valve group comprises a reversing valve, an overflow valve I and an overflow valve II, the reversing valve is provided with an interface A, an interface B, an interface C and an interface D, the interface A is communicated with one end of an oil return pipeline T, the interface D is communicated with one end of an oil inlet pipeline, and the interface C is communicated with one end of an oil supply pipeline; an oil port a, an oil port b and an oil port c are formed in the overflow valve I, the oil port b is communicated with the oil inlet pipeline through a pipeline, and the oil port c is communicated with the oil return pipeline T through a pipeline; an oil port e, an oil port f and an oil port g are formed in the second overflow valve, the oil port e is communicated with the oil supply pipeline through a pipeline, the oil port f is communicated with the oil inlet pipeline through a pipeline, and the oil port g