In order to understand the change rule of the influencing factors of the environmental regulation of the reserve sow houses in summer, the temperature, relative humidity and ammonia in the reserve sow house were tested by changing the number of fans, fan combination, and wet curtain. The results showed that the more fans were turned on, the greater the range of temperature decrease (the maximum range was 2.66 ℃) and the greater the range of relative humidity increase (the maximum range was 9.76%), the more uniform the distribution of temperature and humidity in the ventilation direction in the reserve sow house. The maximum cooling range was 4.27 ℃, and the maximum increase of relative humidity was 24.17%. When the left and right fans were turned on, the distribution of temperature and humidity in the shed was more uniform than that of the left or right middle fans. The average THI index in the reserve female sheds was 79.5, with a decrease rate of 3.86%, which could effectively alleviate the heat stress of pigs. The uneven coefficient of temperature field and relative humidity field in the reserve piggery were 0.42 and 0.5, respectively, indicating that the distribution of temperature and humidity in the reserve piggery was relatively uniform.