Size detection device for injection product

The utility model relates to the technical field of detection, and discloses a size detection device for an injection molding product. The size detection device for the injection molding product comprises a first workbench and a size detection unit, a second workbench is arranged on the upper surface of the first workbench, and optical glass is arranged on the second workbench; the size detectionunit is installed on the first workbench and comprises an image collector, a first driving assembly for controlling the image collector to ascend and descend, a second driving assembly for controllingthe image collector to move in the X-axis direction and a third driving assembly for controlling the image collector to move in the Y-axis direction. According to the size detection device for the injection molding product, when the size of the injection molding product is measured, the position of the optical glass does not need to be moved, the problem that the injection molding product slidesoff from the optical glass