Over-date commodity interception method and device based on two-dimensional code scanning settlement method

The invention provides an expired commodity interception method and device based on a two-dimensional code scanning settlement method, and belongs to the technical field of two-dimensional code scanning. The problem that an existing supermarket system cannot judge whether commodities are expired or not when the commodities are scanned is solved. The method comprises the following steps: S1, identifying a two-dimensional code; s2, judging input; s3, locking the keyboard; s4, judging the text, and if the text is a commodity two-dimensional code text, executing the step S5; if the text is not the commodity two-dimensional code text, executing the step S10; step S5, obtaining a shelf life; s6, judging whether the commodity is expired or not, and if the commodity is expired, executing the step S7; if the commodity is not expired, executing a step S8; step S7, processing expired commodities; step S8, obtaining a bar code text; step S9, outputting a bar code text; and S10, outputting the text. The method has the adv