In order to research the influences of different straw bioreactors on tomato root soil temperature and growth of tomato，and provide theoretical bases for straw bioreactors on increasing tomato output，a greenhouse experiment was conducted by applying straw bioreactor technology using straws of rice and maize as raw materials.The normal cultivation was taken as the control.Microclimate in the greenhouse，the agronomic characters，disease resistance，output and other indexes of tomatoes were measured. The result indicated that compared with the control，maize straw and rice straw increased the soil temperature by 3.7 and 2.7℃，increased the content of organic matter by 6.86 and 4.80 g/kg， increased the output by 22.7% and 10.4%，decreased total soil salt content by 0.39 and 0.33 g/kg，reduced the bad fruit rate by 7.3% and 4.2%，and decreased the morbidity by 2.87% and 0.44%,respectively.Therefore，it was concluded that straw bioreactors could effectively improve physicochemical property of the soil，and increase the output of tomatoes.Maize straw bioreactor has better effect.