Abstract: Taking ‘Fengshun 28’ Chinese cabbage as the experimental material, the effects of different proportions of urea, compound fertilizer, potassium sulfate, calcium superphosphate and quicklime on Chinese cabbage seedling were studied by matrix cultivation method, in order to determine the quality of Chinese cabbage seedlings, screen out the matrix fertilization formula for Chinese cabbage strong seedlings, and provide reference for simplifying Chinese cabbage seedling cultivation and improving seedling quality.The results showed that the high fertilizer formula H1（8.70 g urea, 6.67 g N-P-K 17-17-17 compound fertilizer, 4.00 g potassium sulfate）,H2（8.70 g urea, 6.67 g compound fertilizer, 12.50 g calcium superphosphate）,H3（8.70 g urea, 6.67 g compound fertilizer, 4.00 g potassium sulfate, 1.58 g quicklime） had too high fertility, which inhibits the emergence of Chinese cabbage and leads to fertilizer damage.The emergence rate of formula H1,H2,H3 substrate fermentation for 10 days was 12.50%,0%,and 31.94%,respectively.The emergence rate increased with the fermentation, and the emergence rate increased to 100% after 30 days.2.9 g of urea, 2.24 g of N-P-K 17-17-17 compound fertilizer and 4.17 g of calcium superphosphate were added to every 2 L of substrate, the plant height was 14.08 cm, the root length was 12.85 cm, the leaf thickness was 0.19 mm, the fresh weight on the ground was 3.14 g, the dry weight of the whole plant was 376.72 mg, and the strong seedling index was 63.86,which was significantly higher than the control.On the basis of formula L4,L5 and L9 fertilization, adding 80 mL of ferment can promote the growth and fresh weight increase of Chinese cabbage, but it was not conducive to the increase of dry weight.The strong seedling index was 26.15,28.94 and 26.69 respectively.Too high fertility in seedling raising will inhibit the emergence rate and cause fertilizer damage.When 2.9 g of urea, 2.24 g of N-P-K 17-17-17 compound fertilizer and 4.17 g of superphosphate were added to every 2 L of substrate, the seedling quality of Chinese cabbage was the highest.Pre-mixed fertilizer substrate fermentation could remove the inhibition of fertilizer on the emergence of Chinese cabbage, and the suitable fermentation time was more than 30 days.Ferments could promote plant growth and increase fresh weight, but the strong seedling index was significantly lower than that of the control without ferments, so it was not suitable to add in the seedling substrate.