Through the experiment of protected vegetable plot，taking sheep manure organic fertilizer，chicken manure organic fertilizer and Flammulina velutipes residue organic fertilizer as the research object，the improvement effects of the above three organic fertilizers on the secondary salinized soil and tomato yield in protected tomato vegetable field under the same nitrogen application level were compared.The results showed that:Under the same nitrogen application level，the reduction rates of soil EC of different organic fertilizers on protected vegetable fields were 48.7%，28.8% and 40.7%，respectively.The contents of K+，Na+，Ca2+，Mg2+，Cl- and SO42- in soil were reduced by organic fertilizer.Among them，sheep manure organic fertilizer had the best effect，reducing by 43.9%，44.6%，14.5%，31.0%，44.4% and 64.6%，respectively.At the same time，the application of different organic fertilizers increased the contents of soil NO^3--N and available phosphorus to varying degrees，especially in chicken manure treatment，which increased by 347.2% and 11.9%，respectively.The ability of sheep manure treatment to increase soil NO^3--N was the lowest，with an increase of 113.8%.On the contrary，the release effect of soil available potassium was higher than that of chicken manure and Flammulina velutipes residue，but the effect between treatments was not significant.To sum up，considering the salt and nutrient indexes of the three organic fertilizers on the secondary salinized soil in the protected vegetable field，the effect of sheep manure organic fertilizer is better than chicken manure organic fertilizer and Flammulina velutipes residue in the soil improvement.