Lightweight carbon fiber hollow hydraulic cylinders are mainly used in reinforced concrete construction, foundation works and wind turbine applications. Ultra-light hollow pistons can shorten operating time in the field, improve tensioning efficiency, reduce mechanical handling requirements, and improve on-site operator safety. Instead of the traditional steel hydraulic cylinder, the volume is heavy, there is no assistance, can not move, difficult to locate, the weight of the lightweight carbon fiber hollow hydraulic cylinder is usually between 1/3 and 1/4 of the same type of steel hydraulic cylinder. Carbon fiber composite material, lightweight, easy to use and move in the field, saving manpower and operation time。