The waste gas from a medical injection molding in Jinshan, Shanghai, is the waste gas produced in the process of pharmaceutical treatment, which can only be discharged after strict treatment, otherwise there will be obvious odor and environmental pollution. Also can not pass the environmental testing, facing the situation of production line shutdown. After communication and discussion with the enterprise, the plasma purification equipment and UV deodorization equipment were developed, and the waste gas treatment and deodorization were solved together to completely solve the worries of the enterprise.