Abstract: In view of the continuous expansion of the landscaping area in China, the hedge and landscape trees pruning has become a heavy and time-consuming work, ordinary garden pruning machine pruning efficiency is not high problem, need to perform the steady state characteristics of the garden pruning robot end executive mechanism tool research, and finally achieve the purpose of efficient equipment pruning. This paper expounds the structure, working principle and operation method of garden pruning robot. Using ANSYS, we construct the relationship model between stress value and strain value, tool tooth number and blade shape, and then optimize the blade and tool blade to study the steady state performance and resonance frequency. Finally, based on the simulation calculation of the Ls-Dyna finite element solution program of ANSYS, the steady-state morphology of the tool pruning process is obtained. The results show that the secondary regression equation model of the number of teeth and the blade mouth shape on the maximum stress and the maximum strain was obtained by Design-Expert software, Identify the best tool combination for 100 tooth double blade, And the maximum stress and maximum strain value are 5.3475×10~6Pa respectively, 2.6342×10^-5m/m, The tool resonance frequency is 243Hz, Simulation and analysis of the cutting dynamics, When cutting the branches with an outer diameter of 8mm, Tool trim energy changes evenly, The cutting force generated by the branch pruning presents a regular curve, The maximum cutting force was 583N. The experimental verification results of the intelligent garden pruning robot show that the pruning tool at different speeds, the tool presents good steady state characteristics, the final molding rate and the expected effect of pruning remain at about 85%, achieving the design target quality requirements.