A coated heat sink includes: a copper base seat, an aluminum heat-dissipating seat, a plurality of heat pipes, a solder, a heat-conducting adhesive glue, and a plurality of heat-dissipating fins. The aluminum heat-dissipating seat disposes on top of the copper base seat. The heat pipes dispose on the top of the copper base seat. The solder respectively forms on contact surfaces among the copper base seat and the heat pipes for joining the copper base seat and the heat pipes together. The glue respectively forms on contact surfaces between the copper base seat and the aluminum heat-dissipating seat and among the aluminum heat-dissipating seat and the heat pipes for joining the copper base seat and the aluminum heat-dissipating seat together, and the aluminum heat-dissipating seat and the heat pipes together. The fins dispose over the aluminum heat-dissipating seat, and the fins stack together and compactly joint with the heat pipes.