The invention provides a series water-cooled radiator based on damping resistors. The radiator comprises a radiator main body, a thyristor and a resistor, wherein the radiator main body comprises an aluminum panel, two radiator cavities composed of water channels and water channel walls, a water inlet and a water outlet; the thyristor is attached to the surface of the aluminum panel; the water inlet and the water outlet are respectively formed in the top and the bottom of the radiator main body; the two radiator cavities are positioned in the aluminum panel; the resistors are arranged inside the water channel walls. According to the series water-cooled radiator based on the damping resistors, provided by the invention, the radiating function of the thyristor and the damping resistors are integrated together in a series connection manner, and the series water-cooled radiator has the characteristics of small volume, high radiating capacity, simple structure, large water capacity, high pressure resistance capacity and the like.