The invention discloses a device for preventing collision accidents during automobile door opening. The device comprises a signal acquisition module, a control module and an execution module; the signal acquisition module is composed of an automobile door electronic lock signal acquisition part and an automobile door handle position signal acquisition part; an electric door lock main switch signal and an automobile door handle position signal are collected and are subject to signal conversion; the control module is connected with the signal acquisition module, a sensor signal obtained by the signal acquisition module is comprehensively treated, and a control signal is output; the execution module is connected with the control module, and a control signal output by the control module is treated so as to control an automobile door lock electric motor, and through electric motor positive and reverse rotation, locking and unlocking of an automobile door are achieved; and according to the device for preventing the collision accidents during automobile door opening, in the automobile door opening process, the short delay effect is achieved, the aim of reminding passengers in the automobile to pay attention to pedestrians and automobiles behind the automobile is achieved, and the beneficial effects of being easy to operate, low in cost and the like are achieved.