Sensitive control hydraulic system of load

The utility model belongs to the hydraulic equipment field relates to a sensitive control hydraulic system of load, including the sensitive pump of load, the sensitive proportional valve of load, hydraulic pressure handle and hydraulic tank, the inlet port of the sensitive pump of load passes through the filter and connects hydraulic tank, the P mouth of the sensitive pump of load, LS mouth respectively with the P mouth of the sensitive proportional valve of load, the LS mouth is corresponding is connected, the sensitive proportional valve of load links to each other with first motor, second motor and hydraulic pressure handle respectively, and the hydraulic fluid port of hydraulic pressure handle links to each other with hydraulic tank, be connected through first pipeline between the control oil output of the sensitive proportional valve of load and the hydraulic pressure handle link, be provided with the choke valve on first pipeline. The product of the utility model is simple in structure, rationally, can realize still letting under the condition about being short of power the motor high capacity move in the course of the work.