In order to explore the effects of organic carbon fertilizer on the yield and quality of vegetables as well as soil available nutrients and soil enzyme activity comparing with traditional inorganic or organic fertilizer，inorganic fertilizer(NPK)，chicken manure(M)and water-soluble organic fertilizer(WS)were used in soil cultivation of Brassica chinensis to conduct ten treatments:CK(no fertilization)，NPK，M，WS1(0.4 mL/kg)，WS2(2 mL/kg)，WS3(4 mL/kg)，WS4(6 mL/kg)，MNPK(1/2NPK+1/2Manure)，MWS(1/2Manure+WS2)，NPKWS(1/2NPK+WS2).The relevant indexes of Brassica chinensis and soil were analyzed.Results showed that the higher the amount of WS applied，the higher the aboveground biomass of Brassica chinensis was.There was no significant difference in the aboveground biomass between WS4(8.62 g per plant)and NPK，MNPK，MWS，NPKWS.The crude fiber content in treatments with high amount of WS fertilization(WS3 and WS4，on average)was 62.6% and 38.3% lower than that of CK and NPK，respectively.Treatments M and MNPK had the same effect on reducing crude fiber content as WS3 and WS4.In addition，the contents of soil available N，P，K were higher with higher amount of WS applied.Soil sucrase activity showed the highest value in WS3 and WS4(10.1 mg/g，on average)，followed by M(8.81 mg/g)，and the lowest in CK and NPK(6.41 mg/g on average).In terms of economic benefits，the net income of WS3 and WS4 treatments were negative，while NPK and MNPK treatments showed the highest net income.Therefore，considering the yield，economic benefit and the sustainability of soil fertility comprehensively，chemical fertilizer combined with chicken manure is recommended.The WS fertilizer can be applied as fast-release organic fertilizer after reducing cost.