Abstract: It has been done for two years that experimental study on the environmental factors of multisections poultry housing which was built at Penglai city, Shandong Province,in 1994.The results show:the air temperature and the flowing air speed in multisections poultry housing with brick and concrete structure and tunnel ventilation system in summer are uniformed.The flowing air speed is about 1.4～1.8 m/s in the cage breeding house as the ventilate rate per kg body weight is 5～8 m^３/h,the temperature difference between inlet and outlet is 1.5 ℃ or less.The highest lay egg rate of breeding hens is 869% in summer,and 80% or more of the lay egg rate lasts 10 weeks.