The invention relates to a method for quickly screening benzedrine drugs and morphine drugs in hair on the spot. The method sequentially comprises the following steps of step 1, placing the hair to be detected, and grinding media together in a grinding tube of a crusher, and performing grinding and pulverizing treatment for the first time in the grinding tube of the crusher; step 2, after the grinding is performed for the first time, adding a solvent to the grinding tube, dissolving the hair in the grinding tube, and performing grinding and pulverizing treatment for the second time in the grinding tube of the crusher; and step 3, taking liquid in the grinding tube after the grinding and pulverizing treatment is performed for the second time, performing detection on a corresponding colloidal gold plate, and displaying a screening result. Through the adoption of the method disclosed by the invention, the simple, convenient, quick and on-the-spot operation of screening the drugs in the hair can be realized; the method is high in specificity, high in selectivity, and high in sensitivity, and can be applied to screening the hair of actual drug addicts, and can be applied to the field of forensic toxicological analysis, and the screening and solving of relevant cases.