In order to understand the improvement effects of Zea mays on the secondary salinization of vegetable greenhouse soil, five cultivars of Z. mays (Xianyunuo 2, Taixi 2, Taixi 3, Bohong 5 and Meilan 16) were selected to study the nutrient accumulation of maize and the variation of soil nutrient, secondary salinization in different soil layers. The total biomass, nitrogen uptake, phosphorus uptake, calcium uptake and magnesium uptake of Xianyunuo 2 were the highest, which was 714.94, 12.30, 2.70, 6.11 and 1.13 kg/667 m 2, respectively. Compared with no catch crop, maize palnting could reduce the content of soil available N, available P, available K, exchangeable calcium, exchangeable magnesium in the 0-20 cm soil layer, and the reduction of soil available N, available P, exchangeable calcium, exchangeable magnesium content of Xianyunuo 2 were bigger than those of the other cultivars. Soil EC of the 0-20 cm soil layer dropped by 15.18% to 35.43% after the five cultivars planted, and Xianyunuo 2 showed the largest decline. Therefore, in the interim period of vegetable greenhouse, planting maize could reduce soil nutrient accumulation and remit soil secondary salinization.