#$%^&*AU2020101242A420200806.pdf#####Abstract of Description The invention discloses a control system for harmful gases in henhouses, which relates to the technical field of environmental treatment. A control system for harmful gases in henhouses, comprising the first circulation system (1), second circulation system (2), and combustion system (3). The first circulation system (1) is hydrogen sulfide treatment system, which is installed in the lower part of the henhouse; the second circulation system (2) is ammonia gas treatment system, which is installed in the upper part of the henhouse; the combustion system (3) is carbon monoxide treatment system, which is installed at both ends outside the henhouse. The invention also discloses the application method of the control system for harmful gases in henhouses. The present invention can effectively remove harmful gases in henhouses.Drawings of Description Va FIG. 1 1/3