Through this experiment, we determined indices which can assess salt tolerance of tomato varieties in sprout stage and seedling stage, defined the correlation between salt tolerance of tomato varieties in sprout stage and that in seedling stage, and select some varieties which are obviously salt tolerant so that they can be used as resources for breeding and cultivation of salt tolerant tomatoes. By artificial simulated salt stress with NaCl aqueous solution, we compared 20 tomato varieties′ salt tolerance in their sprout stage and seedling stage according to subjection values of salt toxicity coefficient of indices determined and the sum subjection values and classified the 20 varieties in the two stages by cluster analysis using their single salt tolerance coefficient subjection values and the sum subjection values. Results indicate that salt tolerance in the two growth stages is different, and salt tolerant and moderate salt tolerant tomato varieties have a 53.85% overlap. Germination energy, germination rate, germination index, vigor index, shoot height, shoot fresh weight can serve as indicators to assess salt tolerance of tomato varieties in sprout stage comprehensively. While the fresh and dry weight of the whole plant, shoot height, root length, index of seedling growth and root/shoot ratio can be used to assess salt tolerance of tomato varieties in seedling stage.