Abstract: To establish a method for quickly testing plastic bags for clothing packaging through the results of tensile testing machine.Under the setting conditions of a speed of 300 mm/min and a spacing of 50 mm using an electronic tensile testing machine,all samples were divided into a width of 15 mm,and 100 transparent clothing packaging plastic bags of different brands and specifications were collected for tensile testing.According to the different tensile strength and elongation at break of the samples,they can be divided into five categories with an accuracy of up to 98%.This method is simple and feasible,and can provide a scientific basis for the classification of tensile strength of plastic bags for clothing packaging.It also provides a fast and low-cost new method for police to infer the packaging purpose or physical characteristics of the loaded items.