Aiming at the problems of low automation level， high labor intensity and low feeding efficiency of piglet feeding， a piglet feeding system was designed， and an automatic control system with PLC controller as the core was developed to realize the automatic control of water addition， temperature control， stirring and feeding in the process of piglet feeding.The effects of pipe diameter， pipe material， inlet temperature and pipe flow rate on the pressure distribution and temperature distribution of milk water pipeline were investigated by CFD numerical simulation.Based on the simulation results， the basic parameters of the pipeline were determined， namely， the pipe material was PPR material， the pipe diameter was 6 branch pipeline （external diameter was 25 mm， wall thickness was 2.8 mm） and the pipe flow rate was 0.8 m/s.The performance test showed that the average relative error of the temperature control accuracy of the piglet milk jar was 0.91%， and the temperature variation was maintained at ± 1 °C.The standard deviation of temperature sample was 0.226 3 ℃， and the coefficient of variation was 0.499%； the temperature range of piglets feeding point was 36-45 ℃； the pressure distribution of piglet feeder ranged was 28.36-53.20 kPa.The results showed that the piglet feeding system could normally realize the functions of water supply， stirring， heating， circulation and drainage.The pipe pressure and temperature distribution at each feeding point met the requirements of piglet feeding.This study has important practical significance and application prospect for improving the level of feeding automation and feeding management of piglets.