In order to control the process of salinization of greenhouse soil,maintain sustainable utilization of salinealkali soil,one greenhouse amendment trial,with different rate of humic acid fertilizer combined gypsum,fungi mushroom residue and aluminum sulfate application,was conducted in Daqing city,Heilongjiang province.The content of soil salt and the pH value were detected prior and after applying the ameliorants,which could reveal the effect of soil improvement.The results showed that the total content of soil salt and the pH value were reduced from 1.665 g/kg to 0.851 g/kg and from 9.32 to 8.35,respectively,in treatment 5(humic acid fertilizer 1 050 kg/ha+gypsum 1 050 kg/ha+aluminum sulfate 22.5 kg/ha+fungi mushroom residue 30 000 kg/ha).Tomato yield of it increased by 19.2% compared with treatment 1(N 180 kg/ha，P2O5 180 kg/ha，K2O 75 kg/ha，swine manure 7.5 t/ha)and economic profits increased by 50 070.9 yuan/ha.The correlation analysis indicated that there was a quadratic regressive relationship between the decrease rate of soil total salt content and pH value with humic acid application rate.Based on the above analysis we could see that treatment 5 was the optimized measure for improving salinealkali soil,increasing tomato yield and economic profits.