The detection test paper strip includes four parts: the filtering sample paper, glass fiber of antibody of amphetamine methyl marked by colloidal gold, in T line area (detection area), coated by amphetamine methyl-BSA and in C line area (quality control area), film of pyroxylic coated by ovine antibody for anti the antibody of rat, absorbent paper. The formula of the process solution of the filtering sample paper is as follows. Brij 0.05-3 wt%, Triton X-100 0.01-2%, BSA 0.5-3%, NaCI 3-9%, pure water 90-97%, PB buffer solution 0.01-0.03 mmol. The invention provides the features of high sensitivity, strong specificity, good repeatability, fast and accurate.