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An effective aeration and mixing system composting system was created to address the problems of slow temperature rise and incomplete composting. The system consisted of a segmented aeration mechanism and a combined mixing device for dissolved oxygen. The composting process was designed in a stepwise composting process through the structural design of the two main devices, and the strength of the aeration device and mixing device of the aeration and mixing system were verified by using EDEM (DEM) and ANSYS (FEM) software. The results showed that the maximum stress value in the aeration system appeared in the aeration pipe with 13.064MPa and the maximum deformation was 0.038126mm, and the maximum stress value in the mixing device appeared in the mixing blade with 190.31MPa and the maximum deformation was 0.34417mm, which was in accordance with the design requirements. On this foundation, a 14 day composting test using food waste and maple leaves as feedstock was carried out to test the performance of the aeration and mixing system, record the changes in key parameters of the composting process and measure the relevant indexes of the fermentation production. The test results showed that the compost pile temperature of the rotary composting reactor with this aeration and mixing system reached 53.34℃ on the third day, the maximum temperature of the compost pile reached 69.56℃, and the high temperature period (＞50℃) was maintained for 6d. At the same time, the water content of the product reduced 27.21%, the pH value was increased to 8.4 and the maximum seed germination index reached 131.4%, which met the standards for organic fertilizers (NY/T 525—2021),，and the rotary composting reactor operating costed only RMB 65.51 yuan/t.