Abstract: In view of the poor sowing uniformity, the phenomenon of missed sowing and replanting in the existing soybean seed metering device, the soybean double row clock metering device was optimized in this paper. Firstly, the seed metering assembly of soybean seed metering device was designed, secondly, the double row guide seed tube was designed, and finally the shell was designed. Taking the inclination angle of the hole, the inclination angle of the seed guide tube, the working speed as the test factors, the qualification index, the variation index, the rebroadcast index and the missed sowing index as the experimental indexes, the orthogonal test of three factors and three levels was carried out. The qualified index of the metering device was 93.6% when the inclination angle of the hole was 30°, the inclination angle of the seed guide tube was 60°, and the working speed was 6 km/h. The variation index was 7.4%, the replanting index was 3.1%, and the missed sowing index was 2.3%. The results of field comparative experiment showed that the qualified index, variation index, replanting index and missed sowing index of soybean double row metering device optimized by orthogonal test were 8.96%, 26.73%, 16.22% and 11.54% better than those of traditional slot wheel metering device. Therefore, the operation performance of the optimized soybean double row metering device was excellent.