The structural parameters of circular saw blades have significant influence on the wear resistance of circular saw blades. Reasonable optimization of structural parameters will greatly improve the wear resistance of circular saw blades. In order to prolong the service life of Caragana flat stubble-saw blades, the physical parameters and contact parameters of Caragana and 65Mn circular saw blades were obtained through experimental measurement and theoretical analysis of the measurement results. Then, four main structural parameters of circular saw blades, including tooth number, tooth thickness, front angle and back angle, were analyzed by using the simulation orthogonal test method combined with the simulation results of the saw blade simulation model. Its influence on the maximum wear in the sawing process was obtained. The influence curve of each factor was obtained by single factor simulation test, and the influence trend of each factor was obtained. The four saw blade parameters were optimized and analyzed by response surface analysis and prediction model. The results show that the optimal parameter combination is tooth number 100, tooth thickness 2 mm, front angle 21°, back angle 21°, and the maximum wear amount is 8.249 96 μm, which meets the actual demand. It can provide reference for analyzing the cropping technique and optimizing the mechanism of Caragana.