The invention relates to the field of mechanical equipment, in particular to an automatic pipe feeding machine applied to construction engineering. The automatic pipe feeding machine comprises a working cabinet, a workpiece bearing device and an automatic feeding device. The workpiece bearing device comprises a first bearing part arranged obliquely, a first pushing part used for pushing the wholeline of to-be-fed cylindrical workpieces, a first discharging part installed at the output end of the first bearing part, and a first jacking part installed between the first pushing part and the first discharging part; the automatic feeding device comprises a first conveying part installed at the output end of the first discharging part, a first driving part installed in the working cabinet and used for driving the first conveying part to rotate, and a first positioning part installed on the top of the working cabinet and used for fixing the first conveying part; and the input end of the first conveying part is connected with the output end of the first discharging part in a butting mode. The multiple to-be-fed products are conveyed to the specified positions through the automatic feedingdevice sequentially, and the working efficiency is improved through the conveying mode.