The invention discloses an innocent treatment method of a waste solution generated after an agricultural product laboratory test. The method comprises the steps of treatments of an acetonitrile waste solution, a methylene dichloride waste solution, a strong acid waste solution, a strong base waste solution, a mercury waste solution, a cadmium and lead waste solution and a chrome waste solution; after the treatments, acetonitrile is converted into a ferricyanide complex and stored, mercury is converted into a mercuric sulfide deposit and stored, the cadmium and lead waste solution is converted into an aluminum hydroxide, lead hydroxide and cadmium hydroxide co-precipitate and stored, the chrome waste solution is converted into an iron hydroxide and chrome hydroxide co-precipitate and stored, the methylene dichloride can be recycled after being distilled, strong acid and strong base are neutralized and diluted and then discharged; in this way, the waste solution generated after the laboratory test is almost not directly discharged into water, so that the water environment is protected and the harmfulness of life caused by the waste solution is reduced.