The high-power DC magnetron sputtering coater includes a 2-inch water-cooled target head and a rotatable sample table. The water-cooled target head prevents the surface of the coated sample from being deformed or even damaged due to high coating temperature; The sample table can be rotated, so that the sample can be rotated and coated so that the surface of the sample after coating is uniform. The equipment is small in shape and cost-effective. It is an ideal coating equipment for making various metal films. It can be used with various metal targets and vacuum pumps.