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In order to solve the problems such as poor adaptability, small supporting power, high ground clearance, large turning radius, poor pass-ability, etc. of the orchard operating machinery, combined with the orchard cultivation mode and agronomic requirements, a multifunctional dynamic chassis for orchard was designed. The structure and working principle of the multifunctional dynamic chassis for orchard were expounded, and the traveling power system and rear power output system and the three double-acting hydraulic quick-connecting output ports were designed. The theoretical of the steering performance, stability performance and crossing performance of the whole machine were analyzed theoretically. The finite element analysis of the frame was carried out to show that the maximum total deformation of the frame was 5.08mm in the middle beam part, the maximum equivalent elastic strain of the frame was 0.0035 and the maximum equivalent stress of the frame was 390.52MPa at the hinge joint between the axle and the frame under the condition of full load four-wheel landing. The maximum total deformation was 20.74mm at the side beam of the frame, the maximum equivalent elastic strain of the frame was 0.0058 and the maximum equivalent stress of the frame was 805.46MPa at the hinge joint between the axle and the frame under the condition of full load three-wheel landing. Field experiments were carried out in the orchard. The experiment results showed that the speed of multifunctional chassis for orchard was 0~35km/h, field working speed was 1~6km/h, minimum turning radius was 2m, maximum climbing angle was 24°and maximum crossing height was 235mm. Multifunctional chassis was able to connect a variety of agricultural tools as a multi-purpose machine, which can meet the requirements of field production management operations in the orchard and improve the mechanized production management level of the orchard. The research result provided theoretical and experimental basis for the research of general-purpose dynamic chassis for orchard, and provided a basis for the improvement and lightweight design of the subsequent chassis.