Multi -functional hydraulic output stage of excavator

The utility model discloses a multi -functional hydraulic output stage of excavator, including main pump, switching -over valve, servopump and oil tank, the switching -over valve passes through diverging device and is connected with the oil tank, diverging device includes in -line, meter in valve, overflow valve body, the sensitive oil circuit of load, attonity low pressure overflow valve, flow valve, adjustable guide's type overflow valve and oil return way, the oil -out of overflow valve body is connected with the oil inlet that external handheld hydraulic pressure attached through output oil pipe, the oil -out of overflow valve body still is connected through the sensitive oil circuit of check valve and load, is equipped with first choke valve between the spring cavity of load sensitivity oil circuit and overflow valve body, and load sensitivity oil circuit passes through the flow valve and is connected with the oil return way, the oil return way is connected with the oil return opening that external handh