The factor that influence the stability of the product in the process of manufacture was studied.Using the cross experiment make the corresponding samples, and testing the change of its content and pH by accelerating test.Results showed that some minimal heavy metal that separated from the mixing liquid tank and container can decrease the content of Procaterol Hydrochloride when the pharmacetic liquid in the mixing liquid tank and container.It was concluded that using different mixing liquid tank and container can decrease the content of Procaterol Hydrochloride Oral Solution