In order to understand the effects of different altitudes and soil textures on tomato quality, this study used4 tomato varieties as test materials, and tested them on sandy loam soil at higher altitude, sandy loam at lower altitude and loam at lower altitude. Eleven quality indicators such as soluble solids and titratable acid of mature fruits are evaluated by factor analysis. The results show that after analyzing 11 indicators, 3 common factors（F₁-F₃） are obtained, and the cumulative variance contribution rate is 86.70%. F₁explanatory indicators include phosphorus, potassium and magnesium, and F₂ explanatory indicators include titratable acid content, Solid-acid ratio and sugaracid ratio, F₃ explanatory indicators include soluble solids and soluble sugars, combined with the contribution rate of each factor to establish tomato quality scoring standards: comprehensive score =（0.331 1F₁+0.278 8F₂+0.257 1F₃）/0.867 0. Comparing the fruit quality at an altitude of 611.4 m and an altitude of 53.7 m, the fruit at an altitude of53.7 m has a higher score for the first common factor, but the second and third common factors are higher at an altitude of scores 611.4 m. Taken together, the fruit at an altitude of 611.4 m has a higher comprehensive score. Comparing the fruit quality of sandy loam soil and loam soil, the scores of the three common factors are higher in sandy loam soil, and the comprehensive score is higher in sandy loam soil. Therefore, higher altitude and sandy loam cultivation are more conducive to the improvement of tomato quality.