Aiming at solving artificial picking, low efficiency and time-consuming, shear-sucting mountain chrysanthemum picking machine was designed to achieve mechanization. The picking machine mainly consisted of container, lithium battery, negative air compressor, transmission pipeline, picking box, comb-teeth, synchronous wheel, transmission shaft, separating teeth, DC stepper motor, DC motor speed controller, digital controller, a machine frame and four wheels. Comb-teeth gap was larger than the diameter of bud and less than diameter of chrysanthemum receptacle. The relative motion between comb-teeth and separating teeth pulled from the receptacle. Under the pressure of negative air compressor, the flower was transported to the container. Single factor tests of comb-teeth gap selected 7mm, 8mm, 9mm, 10mm and 11mm five levels. The machine worked well at the gap of 8~9mm. The picking rate was 87.50%~93.11%, the broken rate was 0~0.34%, the drop rate was 1.99%~2.39%, the impurity rate was 4.87%~6.48%, the leakage rate was 3.30%~4.96%. The orthogonal tests showed that the best combination was comb-teeth gap, comb radius, wind speed and rotational speed. When the comb-teeth gap was 8mm, the radius was 50mm, the wind speed was 8m/s and the rotational speed was 30r/min, the machine would work better. The picking rate was 94.54%, the broken rate was 0.57%, the drop rate was 2.05%, the impurity rate was 1.48%, and the leakage rate was 1.36%.