Abstract: This study aims to create a kind of superfine powder rape seed coating agent as reference for the research, application, and evaluation of new rapeseed coating agents through the screening on the three self-made superfine powder rape seed coating formulas to detect the best formula and coating ratio, and the physical and chemical properties based on the indoor germination emergence and seedling quality test. The results showed that the WFY-1 is the best formula with the optimized agent and seed ratio of 1: 300, pH value of 6.89, the viscosity of 12.3 mPa/s, forming-film time of 7.8 min, coating uniformity rate of 97.5%, and coating detached rates of 3.1%, which lead to the conclusion that WFY-1 could promote germination, enhance adult seedling rate, and improve seedling qualities of capsicum seeds with the outstanding physical and chemical properties, and the general effects of this capsicum seed seed-coating agent are better than those of the import agent used in this experiment.