The invention provides a back sticking type/embedded type CPE plastic waterstop belt and a processing method. Specifically, the CPE waterstop belt comprises a waterstop belt body, wherein a plurality of convex ribs are arranged on the waterstop belt body. Self-adhesive layers are arranged on the outer surfaces of the convex ribs and between every two adjacent convex ribs. A novel processing technique is adopted so that the CPE self-adhesive waterstop belt which has the good flexibility of a rubber waterstop belt and the excellent aging resistance, weather resistance and acid and base resistance of a plastic waterstop belt can be manufactured; by smearing polymer self-adhesive films on the surface layer of the waterstop belt, the waterstop belt can be well bonded with concrete and a waterproof board, and tight connection between waterstop belts as well as between the waterstop belt and the waterproof board can be achieved easily and rapidly through heat-melting welding; and construction is convenient and fast, and the problem of water leakage of a joint of the waterstop belt is effectively solved.