Device for dynamic and continuous treatment of polyamide fibers under supercritical CO2

The utility model relates to a device for dynamic and continuous treatment of polyamide fibers under supercritical CO2. The device comprises an autoclave, an oil bath system, two rotating rods, temperature measuring and pressure measuring sensing equipment, an autoclave cover as well as a pressure gauge, a temperature display and a rotating controller which are arranged outside, wherein the autoclave is provided with a liner, and the autoclave cover is provided with a gas inlet and a gas outlet. A bunch of aramid fibers winds around one of the rotating rods and is connected with the other rotating rod, a grafting solvent is placed in the autoclave firstly, then CO2 with certain pressure is fed into the autoclave, a supercritical state is reached at a certain temperature, and the two rotating rods are controlled to be at different rotating speeds, so that the fibers are under different drawing forces, and the dynamic and continuous treatment of the fibers is realized.