Abstract: 【 Objective 】 In order to make clear the application of the impulse type smoke machine to the greenhouse tomato, the control effect of it on tomato leaf diseases and bemisia tabaci and the effect on temperature and humidity inside the greenhouses.【 Method 】The sprayer and pulse type smoke machine were used respectively in two greenhouses and a temperature and humidity meter was used to monitor and record the diseases of tomato and whitefly, and the effects of different treatments were compared. 【 Result 】The investigation results of plant diseases and insect pests showed that in the greenhouse tomato disease epidemic period, the control efficiency of the smoke machine was higher than the sprayer and there was significant difference; In its early stages, control effect of the smoke machine was lower than the sprayers, but there was no significant difference; the control effect of 1d, 3d and 7d after spraying pesticide was significantly higher than that of spray device by using the smoke machine to prevent the bemisia tabaci. Temperature and humidity monitoring results showed that after taking the fungicide 2 h, 3 h, and at 11 the next day, temperature within the greenhouse by using smoke machine to spray the pesticide was 1.8 ~ 2.3 ℃ higher than that by using sprayers, and humidity was 12% ~ 29% lower than that by using the sprayer.【 Conclusion 】Pulse type smoke machine application in greenhouse, compared with sprayers, could increase the temperature in the greenhouse and lower the humidity, so accordingly, the control effect on greenhouse tomato diseases and bemisia tabaci was increased.