Inverted band sawing machine

The utility model discloses an upside-down type band sawing machine which aims to overcome the defect that in the prior art, an upside-down type band sawing machine is low in cutting efficiency. According to the technical scheme, the saw frame comprises a hanging support, an installation stand column is arranged on the lower side of the hanging support, a saw frame body is arranged on the installation stand column in a sliding mode, and a feeding port is formed in the lower portion of the saw frame body; a lifting mechanism is arranged between the suspension bracket and the saw frame body; the fast descending sensing device comprises a guide column arranged on the portion, above the feeding port, of the saw frame body in a sliding mode, a baffle is arranged at the end of the guide column, the baffle and the saw blade are arranged in parallel, and a distance sensor is arranged on the baffle. The distance between the saw blade and a workpiece can be detected through the fast descending sensing device, so that t