The invention provides an auxiliary pipe-conveying device for on-site mixed explosives, which belongs to the technical field of conveyer devices for mixed explosive-conveying pipes. The device comprises three parts, namely a bracket part, a guide rail part and a clamping part, wherein the bracket part comprises a bracket, a rotating stand and a locking device; the guide rail part comprises a guide rail seat, a reciprocating screw, a guide pillar, a screw power source, a dentate coding disc, a rotational speed sensor and a position sensor; and the clamping part comprises a clamping device frame and a clamping device. The pipe-conveying device has the advantages that the pipe-conveying speed of the device is 1 to 36 m/min and can be adjusted in real time according to need so as to increase explosive-loading precision, improve explosive-loading structure and solve the explosive-loading problem of deformed guns; the diameter of explosive-conveying pipes of the device is in a range between 22 and 50 mm and can be changed according to actual need; and the device can convey the explosive-conveying pipes in any direction, thereby improving efficiency and reducing labor intensity.