Abstract: Provided is a test paper kit for rapid graded quantitative detection of aromatic primary amine content in an acidic solution and an application thereof, and belongs to the field of detection. A test paper kit for rapid graded quantitative detection of aromatic primary amine content in an acidic solution, including 9 independent test paper sheets I-IX, wherein the test paper sheets are obtained by soaking filter paper in the following solutions respectively and then drying the filter paper: the test paper sheets I-III are soaked in alcoholic solutions of p-dimethylaminobenzaldehyde with three concentrations respectively; the test paper sheets IV-VI are soaked in alcoholic solutions of p-hydroxybenzaldehyde with three concentrations respectively, and the test paper sheets VII-IX are soaked in alcoholic solutions of p-methoxybenzaldehyde with three concentrations respectively.