Solar air heat collecting pipe

The utility model discloses a solar air heat collecting pipe, comprising a heat collecting pipe body (1). An opened type concave air flow guide groove (2) is arranged on the heat collecting pipe body (1); and flow guide holes (3) are arranged at two ends of the air flow guide groove (2) and are communicated with an inner cavity of the heat collecting pipe body (1). With the solar air heat collecting pipe, preheated air at the outer side of the solar heat collecting pipe can be heated secondarily by the air flow guide groove, and then enters the inner side of the pipe body through the flow guide holes at the two ends of the air flow guide groove, so that the air at the inner side and the outer side of the solar heat-absorbing plate can be ventilated directly and mutually. Therefore, not only is the temperature rise speed of the air accelerated, but also the heat generated by the heat absorbing plate is fully utilized. The solar air heat collecting pipe can not be limited by the sizes of other accessories when