The utility model discloses an ammonia gas recovery system, which includes a plurality of groups of film absorption components connected sequentially through a pipeline, wherein suction check valves and exhaust check valves are arranged on the film absorption components. The ammonia gas recovery system is ingenious in design, simple in structure and convenient to operate, guarantees the pressure balance of the film absorption components in virtue of the cooperation of the suction check valves and the exhaust check valves, and avoids deformation caused by unbalanced pressure of the film absorption components, thereby enabling the whole device to stably run and being more environment-friendly and energy-saving.