Abstract: To evaluate the effects of environmental factors on the biological characteristics of tomatoes in the greenhouse, the changes of environmental factors (temperature, light, soil moisture content) were determined. The results showed that the effect of light on tomatoes was higher than that of soil water content in the high-temperature environment (30℃ or higher). The speed of tomato growth and fruit development were improved in the case of lower light. The synthesis of chlorophyll was influenced in the soil moisture and light groups. Of the two groups, greater impact of soil water content on the synthesis of chlorophyll was observed. Of the three varieties, chlorophyll content was in descending order as follows: control groups> shade groups> drought groups.