The invention provides a rubber buoy which sequentially comprises a buoy body, a bonding layer, a buoyant layer, a pressure bearing layer and a wear and ageing resisting layer from inside to outside, wherein end part stainless steel reinforcing cylindrical parts are arranged at two ends of the buoy body; the bonding layer is made of natural rubber cream; an arc part nylon cylindrical part is arranged at a reducing arc part of the buoyant layer; polyester impregnated fabric reinforcing layers wrap the buoyant layer and the arc part nylon cylindrical part; the arc part nylon cylindrical part and the corresponding polyester impregnated fabric reinforcing layer form the pressure bearing layer; the wear and ageing resisting layer is arranged at the outer side of the pressure bearing layer; and glass fiber-reinforced plastic baffle rings are arranged at two ends of the buoy. According to the rubber buoy provided by the invention, the corrosion resistance, impact resistance and elasticity of the buoy are improved, and the service life of the buoy is prolonged; in addition, the rubber buoy is convenient and reliable in use; meanwhile, the production cost of a product is low, and a production process is extremely simple; and the rubber buoy is particularly suitable for connecting steel tubes of various dredging engineering.