A threading device, comprising: a fan, a take-up and pay-off main machine and a connecting hose, wherein the take-up and pay-off main machine comprises a ventilation bin, a wire wheel bin and an electric bin; a fan connector and a hose connector are disposed on the ventilation bin, an air channel communicating with the fan connector and the hose connector is disposed in the ventilation bin, the connecting hose is connected to the hose connector, and the fan is connected to the fan connector; the electric bin and the wire wheel bin are coaxially disposed side by side, the ventilation bin is communicated with a side wall of the wire wheel bin, a first partition plate is disposed between the ventilation bin and the wire wheel bin, a wire wheel is disposed in the wire wheel bin, a wire wheel clutch driving device is disposed in the electric bin, a bent pipe converging device is disposed in the ventilation bin through a first rotating shaft, a converging device lifting torsion spring penetrates through the first rotating shaft, the threading device being characterized in that a bent pipe through hole configured for the bent pipe converging device to penetrate through is disposed on the first partition plate, an arc-shaped first clamping portion is disposed on the first rotating shaft, a first sleeve is disposed on the first clamping portion, an outward outlet of the bent pipe converging device is disposed in the first sleeve in a penetrating manner and is in clearance fit with the first sleeve, an annular groove is disposed in the bent pipe converging devices at two ends of the first sleeve, and a first annular gasket and a clamp spring that are configured to prevent the bent pipe converging device from being separated from the first sleeve are disposed in the annular groove; one end of the converging device lifting torsion spring is inserted into an inner wall of the ventilation bin, and the other end of the converging device lifting torsion spring is lapped on the first sleeve; a rope arrangement auxiliary device is disposed at the bent pipe through hole of the first partition plate and comprises a rope arrangement plate and a reciprocating driving assembly of the rope arrangement plate, a first sliding groove and a second sliding groove are disposed on the rope arrangement plate in parallel, a sliding direction of the first sliding groove and the second sliding groove is perpendicular to a reciprocating direction of the rope arrangement plate, and an inward outlet of the bent pipe converging device penetrates through the first sliding groove; and the reciprocating driving assembly of the rope arrangement plate comprises a first eccentric wheel with a first push rod and a rope arrangement motor configured to drive the first eccentric wheel to rotate, the first push rod of the first eccentric wheel is inserted into the second sliding groove, and the reciprocating driving assembly of the rope arrangement plate is disposed in the electric bin. an arc-shaped first clamping portion is disposed on the first rotating shaft, a first sleeve is disposed on the first clamping portion, an outward outlet of the bent pipe converging device is disposed in the first sleeve in a penetrating manner and is in clearance fit with the first sleeve, an annular groove is disposed in the bent pipe converging devices at two ends of the first sleeve, and a first annular gasket and a clamp spring that are configured to prevent the bent pipe converging device from being separated from the first sleeve are disposed in the annular groove; one end of the converging device lifting torsion spring is inserted into an inner wall of the ventilation bin, and the other end of the converging device lifting torsion spring is lapped on the first sleeve; a rope arrangement auxiliary device is disposed at the bent pipe through hole of the first partition plate and comprises a rope arrangement plate and a reciprocating driving assembly of the rope arrangement plate, a first sliding groove and a second sliding groove are disposed on the rope arrangement plate in parallel, a sliding direction of the first sliding groove and the second sliding groove is perpendicular to a reciprocating direction of the rope arrangement plate, and an inward outlet of the bent pipe converging device penetrates through the first sliding groove; and the reciprocating driving assembly of the rope arrangement plate comprises a first eccentric wheel with a first push rod and a rope arrangement motor configured to drive the first eccentric wheel to rotate, the first push rod of the first eccentric wheel is inserted into the second sliding groove, and the reciprocating driving assembly of the rope arrangement plate is disposed in the electric bin.