A pruner speed regulation control method, containing: a startup step of establishing a power supply system, and sending a trigger signal； an operation step of detecting, by a central processing unit, the voltage of the power supply system, judging whether to maintain the operation of the power supply system so as to send an output maintaining signal, pushing a button of a speed regulation trigger, converting, by the central processing unit, a speed regulation signal sent by the speed regulation trigger into an electrical signal by means of a wire for performing speed judgement, and sending a drive signal after detecting a position signal of an electrical motor to control the rotation of the electrical motor； and a speed regulation step of converting, by a sampling resistor, current into a voltage signal and inputting same into the central processing unit for controlling the electrical motor to rotate according to a certain proportion or rotate with the maximum power. By means of the above method, in the provided pruner speed regulation control method, in the case of zero load, an energy-saving mode is entered for lower output power, and in the case of full load, a constant power mode is entered to maintain the operating current of a pruner with the maximum power unchanged, so that the pruner is easily protected and smooth in operation, and the problems of power consumption in a zero load state and the pruner being easily protected can be well solved.
