The invention relates to a combined speed-regulating pipe cleaner which is used for pigging operation of a pipeline. According to the technical scheme, a front end cover is installed at the front end of a barrel, a rear end cover is installed at the rear end of the barrel, and leather cups are arranged at the two ends of the barrel respectively; rolling wheels are installed on input shafts of two hydraulic pumps, and a supporting spring is arranged between the hydraulic pumps; the hydraulic pumps are arranged on the outer side of the rear end cover; an oil tank is installed on the outer side of the rear end cover, and a brake oil cylinder is installed on the inner side of the rear end cover; a bypass valve is installed on the inner side of the front end cover, and a bypass oil cylinder is arranged on the outer side of the front end cover; a piston rod of the bypass oil cylinder is connected to a valve element of the bypass valve; one end of each connecting rod B is hinged to a corresponding brake pad, the other end of each connecting rod B is hinged to the barrel, one end of each connecting rod C is hinged to the corresponding brake pad, and the other end of each connecting rod C is hinged to the piston rod; an oil suction opening of each hydraulic pump is connected to the oil tank, an oil outlet of each hydraulic pump is connected to a throttle valve, an oil return opening of the throttle valve is connected with the oil tank, and the front end of the throttle valve is connected with the bypass oil cylinder and the brake oil cylinder. According to the combined speed-regulating pipe cleaner, a speed controller is not provided with electrical elements, and safety and reliability are achieved; by adopting a combination scheme of combining bypass valve speed regulation with brake pad speed regulation, the control effect is better.