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Aimed at problems that currently nonuniform seed sowing, low pass rate, high seed missing rate, great seed wasting and severe seed blocking existed in the seedsowing system of preseedcutting sugarcane planters with wide and narrow row spacing, virtual experiment analysis and practical experiment research were conducted through ADAMS. A kind of preseedcutting seedsowing systems with a single roll bottom sowing edge were designed and developed. The effects of the parameters as the rotation velocity of seedsowing roll, lateral plate angle, flowcontrolling plate elastic structure of the sugarcanegathering box of the seedsowing device and ordered rotating sugarcane gathering on seed sowing properties were studied through the test platform. The following results were turned out according to experiment results: the qualified rate of automatic rotating ordered flow guiding sugarcane gathering was 95.1%, the flowcontrolling plate elastic structure of the sugarcanegathering box of the seedsowing device had significant effects on pass rate of seed sowing, the lateral plate angle and the rotation velocity of seedsowing rolls had generally significant effects. Optimized parameters of the seedsowing device were as follows: using the flowcontrolling plate elastic structure, the lateral plate angle of the sugarcanegathering box was 105°, the rotation velocity of seedsowing rolls was 6r/min (the theoretical seed sowing velocity was 0.83s/stick). Finally, these optimized parameters were validated through experiments, which showed as follows: the average qualified seed sowing rate was 91.0% (the average seed sowing space was 0.917s). The average seed missing rate was 4.5%. The average seed blocking rate was 0.5%. The seed sowing uniformity was improved significantly. What mentioned above laid the theoretical research foundation of deeply further development of preseedcutting sugarcane planters.