Abstract: The 1234 precision breeding technology of broiler was studied by taking Cobb 500 chickens as experimental animals. The connotation of this technology was：1 main line of production, 2 times of timely delivery, 3 sections of accurate temperature supply, and 42 days of production. In this study,six 120 m by 14 m chicken houses were divided into two groups, 1 chicken house for 1 repetition. The effects of this precision technology and conventional breeding techniques were compared. The results showed that： The application of precision breeding technology can add up to 329.1 thousand yuan in one production cycle. The unit production cost reduced by 0.566 yuan/kg, and the cost saved by 41.4 thousand yuan for one production cycle of a chicken house. The cost saving and additional income of single-family chicken house increased by 370.5 thousand yuan. The effects of the 1234 precision technology was obvious.

Key words: broiler, breeding technology, temperature, stocking density