In order to test the feasibility of computer simulation in field maize planting, the selection of the maize single-seed precise sowing method is studied based on the quadratic function model Y = A × (D − Dm)2 + Ym, which depicts the relationship between maize’s yield and planting density. The advantages and disadvantages of two planting methods under the condition of single-seed sowing are also compared: method 1 is optimum density planting, while method 2 is the ideal seedling emergence number planting. It is found that the yield reduction rate and yield fluctuation of method 2 are all lower than those of method 1. The yield of method 2 increased by at least 0.043 ton hm−2 and showed more advantages over method 1 with higher yield level. Further study made on the influence of seedling emergence rate on the yield of maize finds out that the yield of the two methods are all highly positively correlated with the seedling emergence rate and the standard deviation of their yield are all highly negatively correlated with the seedling emergence rate. For the study of the breakup problem of sparse caused by the single-seed precise sowing method, the definition of seedling missing spots is put forward. The study found that the relationship between the number of hundred-dot spots and field seedling emergence rate is the parabola function y = −189.32x 2 + 309.55x − 118.95 and the relationship between the number of spot missing seedling and field seedling emergence rate is the negative exponent function y = 395.69e−6.144 x. The results may help in guiding the maize seeds’ production and single-seed precise sowing to some extent.