An intelligent facilities seedling machine was put forward and designed with the analysis of modern factory seedling technology. PLC programmable control was adopted in this machine. Human machine interface, sensor technology and frequency control of asynchronous motors were integrated into the control system to realize the accurate seeding operation. Selecting suction hole diameter, vacuum degree, seed box moving speed as experiment factors, an orthogonal experiment on suction performance was carried out with cabbage seeds as test object. The experiment result showed that the optimal parameter combination of factors were vacuum pressure of 7kPa, suction hole diameter of 0.8mm, seed box moving speed of 0.03m/s, and under the optimal parameter combination of factors, the singleseeding rate was 93.82%, missseeding rate was 3.71%, and reseeding rate was 2.47%. Furthermore, under the above conditions, a seeding performance test was carried out. The test showed that the singleseeding rate can reach 92.63% with seeding efficiency of 400 tray per hour, which can meet the requirements of precision seeding agronomic for vegetables.