The invention belongs to the technical field of fruit tree trimming, and particularly relates to a fruit tree trimming device, which comprises a pair of scissors, a driving bearing, a spring, an angleadjustment gear, a driving belt, a rotating buckle, a detachable clamping buckle, a ground support auxiliary component, a telescopic rod, a driving motor, a trimming switch, a storage battery, a charging port, a handle, a storage bag hook and an illumination light. Under the joint drive of the driving bearing, the spring, the angle adjustment gear, the driving belt and the driving motor, which are arranged, the fruit tree trimming device can cooperate in an auxiliary mode, trims flexibly and saves manpower, by utilizing the adjusting support of the rotating buckle, the detachable clamping buckle, a support, the ground support auxiliary component and the telescopic rod, the fruit tree trimming device not only is flexible to disassemble, improves the portable degree, can adjust and change positions according to the height of a fruit tree at random, saves both time and labor, lowers labor intensity, can improve luminance by utilizing the cooperation of the storage bag hook and the illumination light, but also can hang collected branches outside, thereby improving functional diversity.