Disclosed is a heat dissipation assembly. The heat dissipation assembly comprises a first body, a second body, a third body, a first pipe body, a second pipe body and a working fluid, wherein the first body has a first cavity; the second body has a second cavity; the third body has a third cavity; the first pipe body has a first flowing channel, and the two ends of the first pipe body are connected with the first body and the second body respectively; the second pipe body has a second flowing channel, the second pipe body runs through the second body and is arranged in the first flowing channel in a penetration manner, and the two ends of the second pipe body are connected with the first body and the third body respectively; and the first, second and third cavities are filled with the working fluid.