Abstract: Orchard operations include weeding, spraying, crushing, picking and handling about many kinds of operations, while working environment is narrow and complex.In view of fact that existing electric chassis in the market can not meet various operation requirements for orchard, this paper designed matching of electric power system for crawler chassis for orchard.Based on the overall structure and working principle of electric self-propelled crawler chassis, theoretical analysis and preliminary design of the power system matching were carried out. Simulation model for orchard electric self-propelled crawler chassis power system was established, and theoretical analysis of power system matching was simulated and verified. Chassis prototype was developed and tested, it showed that, the maximum running speed of chassis is 6.52 km/h, speed under two climbing conditions is 1.75 km/h and 1.28 km/h, driving range is 17.8 km, which meets the matching design requirements of chassis power system.