In order to study the effect of inducers on tomato seedling in pot tray,three plant inducers were used to soak seeds. The results showed that the emergence rate of A3 and B1 were 90.0% and 93.3% respectively,and there was no difference both the time to reach the highest emergence rate and the survival rate of seedlings compared with CK. The tomato plant height of treat A1,A2,B1 and B2 was significantly higher than that of CK. The stem diameter of K1,A1,B1,B2 and B3 increased significantly compared with CK. The root length of K1,K3,B1 and B3 increased significantly compared with CK. The fresh weight and dry weight of aerial parts treated with A2 were extremely significant higher than those of CK. The root fresh weight of B1,B3 and dry weight of B1 were extremely significant higher than those of CK. B1 was suitable for tomato plug seedlings.