The invention discloses a fixing device for a bicycle conduit tube at a five-way section, and belongs to the technical field of bicycle devices. The fixing device comprises a frame, a five-way tube and the conduit tube, wherein the frame comprises a rear lower fork, a lower tube and a head tube connected with the lower tube; the free end of the rear lower fork is provided with a first rear lower fork hole which is connected to the two sides of the five-way tube; one end of the conduit tube penetrates into the rear lower fork via one of penetrating holes of grooves, and the other end of the conduit tube penetrates into the lower tube via the other of the penetrating holes of the grooves; at least one groove is formed in the surface of the five-way tube; two ends of the grooves are provided with the penetrating holes through which the conduit tube is accommodated in the grooves of the five-way tube. The fixing device has the beneficial effects that the attractiveness of the frame is guaranteed, brake and shift cables can also move smoothly in the conduit tube, and thus the flexibility of braking and shifting are enhanced.