The utility model discloses a medium-high-temperature vacuum solar collector tube with a double-layer vacuum heat insulation sleeve. The solar collector tube comprises a stainless steel tube, the double-layer vacuum heat insulation sleeve and a semi-closed ring, wherein the surface of the stainless steel tube is processed for higher light absorptivity, the double-layer vacuum heat insulation sleeve is made of full-quartz glass or hard glass, and the semi-closed ring is made of flexible semi-ventilated heat-resisting material. Since the double-layer vacuum full-glass tube is utilized, the problem of a conventional medium-high-temperature vacuum solar collector tube that a metal membrane and glass are technically difficult to weld is solved, product processing is easier, and reliability of long service is greatly improved.