Abstract: 【Objective】 To study the variation law of temperature and humidity in horizontal and vertical direction of solar greenhouses in different operation modes under the condition of high temperature in summer.This result provides theoretical support for the efficient operation of the summer atomization cooling machine, which can help to solve the problem of high temperature and low humidity in the summer production of solar greenhouses. 【Method】 The self-propelled atomization machine integrated cooling, spraying pesticides and fertilizer was used, the running time was 4, 8, 12 minutes, and the interval time was 20,40 and 60 minutes, respectively. A total of 9 operation modes were used to evaluate the cooling effect under the condition of high temperature on sunny days in summer. 【Result】 The best operating modes was running 12 minuteswith an interval of 60 minutes in the morning, running 8 minutes with an interval of 20 minutes at noontime, and running 12 minutes with an interval of 20 minutes in the afternoon. The best atomization cooling effect was found at 3 meters in the horizontal direction, the air temperature reduced on average of 1.3℃, and air humidity increased on a average of 7.6%. Meanwhile, the best cooling effect was detected at 2.5 meters in the vertical direction and the air temperature reduced on average of 2.3℃, and air humidity increased on a average of 11%. 【Conclusion】 T Compared with the control greenhouse, the self-propelled atomization cooling machine on the back wall of the solar greenhouse operates in 12-60, 8-20, and 12-20 operating modes in the morning, noon, and afternoon respectively, which can have a cooling effect in the summer production of the solar greenhouse.