Abstract: [Objective] In order to provide study data for straw formula granulated feed production and processing in Xinjiang, this project aims to conduct experiments to determine the granulating process parameters of compound maize straw particles.[Method]By single factor and orthogonal experiments to analyze the influences such as the ratio of fine and coarse materials, water content of raw materials, raw material crushing length and feeding speed of various factors during the granulation process on indexes: the density of particles with straw feed after forming, powdering rate and molding rate to determine the optimum parameters of main processing technology of straw blended pellet feed.[Result]⑴ When the proportion of raw material and coarse material was less than 5∶5, the molding rate increased greatly, and the pulverization rate decreased greatly.When the proportion of raw material and coarse material was greater than 5∶5, shape index was not ideal and even appeared to be out of shape.The raw material flows directly from the granulator to the crushed state.When we took the pure thick ratio of materials 2∶8, the density of pellet feed and forming rate were maximum, and percentage of powdered pellets was minimum.⑵ When raw material moisture content was 12;, the density of pellet feed and forming rate were maximum, percentage of powdered pellets was minimum.⑶ When the raw material grinding length was 2 (The length was less than 3mm of maize straw mixture), the forming rate was at the peak and the pulverization rate was lowest.[Conclusion]⑴When raw material moisture content range between 10;-14;, particle shaping effect is better, with 12; of the raw material moisture content is optimal.⑵ The effects of different feeding speed on the density of pellet feed, forming rate and pulverization rate are not obvious.⑶ Through the orthogonal experiment and range analysis, we concluded that forage-concentrate ratio to the density of pellet feed and molding rate all have a significant impact, different moisture contents of grain feed raw material pulverization rate effect is remarkable, raw materials for different moisture contents made obviously effect on pulverization rate.⑷ Through the analysis of the comprehensive balance method, we have get primary and secondary order of four factors: forage-concentrate ratio>moisture>size>velocity.And the optimal production condition is A2B2C3D2.