The invention relates to a method, a device and equipment for identifying the version of a plastic coin. The method comprises the steps of intercepting a preset region preset to face a to-be-detected plastic coin, and obtaining the image of the to-be-detected preset region, wherein the preset region is a region of the to-be-detected plastic coin having holographic open-window transparent characteristics; extracting the edge of the image of the to-be-detected preset region to obtain a to-be-detected edge image; according to the actual pixel number of the to-be-detected edge image at a preset position, matching the number with at least one standard pixel number, and determining the version of the to-be-detected plastic coin. According to the invention, the version identifying process of the plastic coin is simplified, and both the speed and the accuracy of the version identifying process are improved.