The utility model discloses a device for mounting a rubber tube in a prestress pore channel. The device comprises a supporting underframe and a driving mechanism arranged on the supporting underframe, wherein a lead-in pipeline and a lead-out pipeline are correspondingly arranged at the front end and the right end of the supporting underframe respectively and on the same straight line; a driving wheel assembly for transmitting the rubber tube led in from the lead-in pipeline out of the lead-out pipeline is arranged between the lead-in pipeline and the lead-out pipeline on the supporting underframe. According to the device provided by the utility model, the device firstly lifts the rubber tube and moves the rubber tube to a proper position to enable the tail end of the lead-out pipeline to be aligned with the prestress pore channel, the rubber tube is led in via the lead-in pipeline, and the driving mechanism works to drive the driving wheel assembly to transmit the rubber tube out of the lead-out pipeline and deliver the rubber tube to the prestress pore channel. The operation is simple, the working efficiency of standardized operation is improved, the mechanized operation requirements are met, and the poling operation is rapidly and safely realized.