The invention discloses a developing medical catheter molding device. The developing medical catheter molding device comprises a main feeding device with a main feeding channel, an auxiliary feeding device with an auxiliary feeding channel, a main dividing device, an auxiliary dividing device, a fusing assembly connected with the main feeding device and a molding assembly connected with the auxiliary feeding device; and the fusing assembly is provided with a fusing channel, the molding assembly is provided with a molding channel communicated with the fusing channel, the auxiliary dividing device is provided with a plurality of auxiliary dividing channels connected with the auxiliary feeding channel, a plurality of first main dividing channels connected with the main dividing device and a plurality of second main dividing channels connected with the main dividing device, the auxiliary dividing channels and the first main dividing channels are arranged to be in a ring shape at preset intervals, the second main dividing channels surround the periphery of the auxiliary dividing channels and are isolated from the auxiliary dividing channels, and all outlets of the auxiliary dividing channels, the first main dividing channels and the second main dividing channels are communicated with the fusing channel. The device is compact in structure, high in machining accuracy, easy to operate and suitable for industrial application and popularization.