Solar energy vacuum heat-collecting tube

The utility model discloses a solar-energy vacuum heat collecting pipe, comprising an inner metal pipe and a glass pipe; the inner metal pipe is covered in the glass pipe, and the two ends of the inner metal pipe are in sealed connection; a metal corrugated pipe and a glass transition pipe which are used to connect the glass pipe with the inner metal pipe are arranged at the connection position of the inner metal pipe and the glass pipe, so a sealed vacuum space is formed. The heat absorption part is formed by plating a layer of high-temperature resistance selecting absorption coating. The utility model integrates the advantages of a glass pipe and a metal pipe, and is of high temperature resistance and high pressure resistance; the operation temperature can reach 600-800 DEG C, and can sustain an in-tube work pressure of 0.1-2MPa, meanwhile, the utility model is of wide application field, and can be conveniently connected with other devices or pipes.