Realization method of automatically increasing loading idle speed of engine of engineering vehicle and control system

The invention relates to a realization method of automatically increasing a loading idle speed of an engine of an engineering vehicle and an idle speed control system of the engine. The method comprises the following steps: determining a first target rotating speed of the engine in a loading idle speed state, arranging an enabling key on an operating handle of the engineering vehicle, and arranging a controller which is connected with an ECU (Electronic Control Unit) of the engine, the operating handle and the enabling key, wherein the controller controls an electronic control fuel injection system to increase a rotating speed of the engine and keep the engine in the first target rotating speed according to the states of the operating handle and the enabling key when idle load is converted into loading. The control system comprises the electronic control fuel injection system, the controller, the operating handle of the engineering vehicle, two target rotating speed storage units and the enabling key arranged on the operating handle, wherein the controller is connected with the operating handle, the enabling key and the ECU (Electronic Control Unit) of the engine. According to themethod and the system, the oil consumption and the carbon emission load of the engineering vehicle can be reduced, and the cost of the engine of the engineering vehicle can be reduced.