Abstract: Based on the analysis of the fruit picking device, a kind of fruit picking device is designed based on the hydraulic transmission device, which takes the lifting platform as the body and has the function of fine adjustment and replacement.The hydraulic transmission device drives the fruit picking rod to rotate, puts the picked fruit into the collecting plate, and uses the mechanical design principle to check the fruit picking device. The analysis results show that the load of hydraulic lifting cylinder is 1000 N, inertia load is 6 N, the total load of hydraulic cylinder is（1100-1300）N, the fruit picking rate can reach 40 per minute, which is twice of the manual picking rate, and the picking process has higher security. The single chip microcomputer driving module is used to cooperate with the hydraulic picking device interactively, so that the picking device has more reliable stability in the working process.