The invention discloses a solar collector tube adopting an inner sleeving type metal glass tube sealing structure. A metal glass sealing piece is inserted into a cover glass tube to form a coaxial inner sleeve shape; the outside diameter of a sealing piece glass tube is smaller than the inside diameter of the cover glass tube, and the sealing piece glass tube and the cover glass tube are coaxiallyput with the ports flush with each other and are connected into an annulus through melting sealing; and a metal circular cover of the metal glass sealing piece is sealed on an inner flange at one endof the sealing piece glass tube by using metal glass hot pressure sealing and is provided with one or two hole to be used for being welded with an eduction metal tube of a metal heat absorption body.The solar collector tube has the advantages that the length of the metal glass sealing piece is less than 10 percent of a whole metal glass vacuum solar collector tube, and hot pressure sealing to aninner plane of the inner glass tube flange is simple and feasible; and an inner glass tube sleeve of the metal glass sealing piece is inserted into the cover glass tube, and the two coaxial glass tube ring sealing technology is simple, can perform mechanical continuous production and thus achieve the purpose of lowering the cost.