Abstract: Aiming at the problems of imperfect design, poor adaptability and uneven sowing depth of furrow opener of plot seeder in China, a plough furrow opener suitable for wheat plot row planter was designed. In order to study the parameter influence of ploughshare opener for wheat plant-row planter on the ditching process, the discrete element software EDEM was used for simulation analysis. The objective law was analyzed that the resistance of the ditching operation and the variable coefficient of the ditching depth were influenced by the length of the retaining plate, the angle of the soil gap and the angle of the shovel tip. The optimal parameter combination of the ditching process was got from data analysis by Design Expert software. Length of the retaining plate was 75.5mm. Opener into the soil gap angle was 3° and shovel tip angle was 20°. It followed that the operating resistance of the opener was 184.8N and the coefficient of variation of the ditching depth was 5.86%. The soil trough verification test showed that the error of variation coefficient of working resistance and trenching depth were 8.77% and 3.07%. This study could effectively improve the performance of the opener and reduce the production cost. The theoretical reference for the power selection of wheat planter was provided.