In order to reduce the environmental pollution caused by the strong alkalinity in the degumming waste liquid in the textile industry, the Fenton method was used to degum the hemp skin fiber. Using residual gum rate, breaking strength, diameter, whiteness and fiber length as indicators, the effects of pH value, ferrous sulfate concentration, hydrogen peroxide concentration and temperature on the effect of hemp degumming process were discussed. The chemical structure and crystallinity changes of hemp fibers were analyzed by infrared spectrometer and X-ray diffraction analyzer, and the degumming effect of hemp fibers was examined by scanning electron microscope. The test results show that the optimum degumming process conditions are pH 6.0, ferrous sulfate mass concentration 10 g/L, hydrogen peroxide mass concentration 9 g/L, and temperature 80 ℃. Under the optimal process, the residual glue rate of the degummed fibers was 10.12％, the breaking strength was 32.453 cN, the fiber diameter was 29.745 μm, and the fiber length was 5.62 cm. It was found that Fenton method can effectively remove the gum of hemp fiber.
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