The invention relates to the field of deodorant application, in particular to a method for detecting deodorant-based removal rate of ammonia, comprising the steps: reagent preparation, testing process, OD value testing and calculation; the invention is intended to provide a method for detecting deodorant-based removal rate of ammonia, enabling effective removal of the disturbances on ammonia detection from alcohols such as ethyl alcohol and acetone, ketones, aldehydes, amines, volatile matters such as sulfides, metal ions such as ferric iron, etc., and enabling simple, fast and accurate detection on the deodorant-based removal rate of ammonia.