A vacuum tube solar energy collector, having a vacuum tube and a heat exchanging tube (2); a circulating water pump (1) is mounted on the pipeline of the heat exchanging tube (2); a heat collecting tube is mounted at the inner side of the vacuum tube. The heat collecting tube comprises an outer copper tube (6) and an inner copper tube (3); the lower end of the outer copper tube (6) is a blind end and the upper end of the outer copper tube (6) communicates with one end of the heat exchanging tube (2); a rubber sleeve (4) for sealing is mounted between the outer copper tube (6) and the vacuum tube; the inner copper tube (3) is arranged in the outer copper tube (6); a gap is provided between the lower end of the inner copper tube (3) and the blind end of the outer copper tube (6); the upper end of the inner copper tube (3) passes through the tube wall of the outer copper tube (6) and communicates with the other end of the heat exchanging tube (2); and superconducting liquid (16) is filled in the inner copper tube (3), the outer copper tube (6) and the heat exchanging tube (2). The present invention has a high heat exchanging efficiency and small volume, thus saving the mounting area, and reducing the weight of the heat collector and manufacturing cost.
