Aiming to solve the problems of high mortality rate of nursery pigs,  high feed waste,  and high labor intensity,  a prototype testing platform for a porridge machine was built,  and an intelligent porridge feeding system for nursery pigs was designed. The system was composed of four parts: a mechanical body,  a handheld terminal,  a central controller,  and a cloud platform. Orthogonal experiment was carried out on the installation height of screw conveyor, the inner diameter of discharge channel and the structure of broken arch in the mechanical body. The optimal parameters combination is obtained as follows: screw conveyor installation height was 60 mm,  discharging channel diameter was 42 mm,  the broken arch structure adapted the combination form of upper and lower broken arch structure,  the filling efficiency was optimal,  the value of λ was 14.2 g/r,  and the water supply error of the system was 143%. When the ratio of water to feed was equal and greater than 1.5∶1,  the liquid level monitoring device can satisfy the requirements of the system. The research can provide a reference for the research and development of feeding equipment for piglets.

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.