Along with the development and progress of the society, the poultry industry in China is gradually to the level of modernization development, in order to realize the automation of poultry breeding in accurate feeding, with the investigation and analysis of effectiveness, this paper has designed a kind of automatic feeding device of pellet feed based on PLC. The device is the main power control core with PLC machine, based on position detection device with proximity switch, and electromagnet drive blanking parts by manual action on the touch screen is set for the blanking time, in order to achieve quantitative automatic feeding [1].