The invention provides a heat-pipe-based cooling device for cooling hot water of an electric heating water kettle. A heating assembly, cooling assemblies and a shell are included; the shell comprisesa base and a top plate; the upper top of the top plate is provided with a middle hole; the heating assembly is arranged on the middle portion of the base; the heating assembly comprises a resistance wire, an electric push rod and a heating column; the resistance wire and the heating column are coaxially arranged; the multiple cooling assemblies are arranged on the peripheral side of the heating column, and each comprise a heat pipe, a fixed hinge, a movable crank, a movable rocking rod and a connection rod; each heat pipe comprises an evaporating cavity, a condensing cavity, an evaporating inner pipe, a backflow outer pipe, a liquid absorbing core and annular fins encircling the outer surface of the condensing cavity of the heat pipe; one end of each heat pipe is provided with the corresponding condensing cavity; and the other end of each heat pipe is provided with the corresponding evaporating cavity. According to the heat-pipe-based cooling device for cooling the hot water of the electric heating water kettle, condensate steam flows through the condensing cavities to form turbulent flow, due to the fact that the condensate steam needs to maintain the eddy movement, heat of the condensate steam is lost into the heat pipes, liquefying of the condensate steam can be accelerated, and the cooling efficiency of the heat pipes is improved.