The invention relates to a liquid heat dissipation component for dissipating heat of a heating element. The liquid heat dissipation component at least comprises a heat absorption unit, a fluid transfer device and a connection pipe, wherein the heat absorption unit is contacted with the heating element and used for absorbing heat generated by the heating element; the fluid transfer device is used for transferring fluid, stacked with the heat absorption unit, and provided with a heat dissipation structure; the connection pipe is connected with the heat absorption unit and the fluid transfer device, and used for transferring the fluid into the heat absorption unit so as to absorb the heat of the heat absorption unit and returning the fluid, which absorbed heat, to the fluid transfer device so as to dissipate heat by using the heat dissipation structure.