The invention discloses an injection mold used for molding a two-layer and two-color product. The injection mould comprises a mold blank that is provided with a movable mold plate and a fixed mold plate, which is corresponding to a two-color injection device. The movable mold plate is provided with two movable molds, the fixed mold plate is provided with a fixed mold. The two movable molds are abreast arranged in the plane of the movable mold plate, which is arranged on a linear type sliding rail consistent with the arrangement direction of the two movable molds. The movable mold plate is connected with a driving device and driven by the driving device to reciprocate along the sliding rail; the size of a molding chamber formed by one of the two movable molds matching the fixed mold is more than that of a molding chamber formed by another movable mold matching the fixed mold; the control device of the driving device is connected with the two-color injection device through a signal line. The difference of the injection molding method from the general two color injection molding method is that the two movable molds on the same of mould sequentially match with the fixed mold through the linear movement of the movable mold plate to realize the two-color and two-layer injection molding.