The invention discloses a comprehensive utilization method of natural polysaccharides and plant fiber in abelmoschus manihot waste. According to the method, the technological design is reasonable, the operability is high, abelmoschus manihot fiber and refined polysaccharides are prepared with an optimizing method from the abelmoschus manihot waste as a raw material, the yield and the utilization ratio of the abelmoschus manihot fiber prepared with the method are high, the average tensile index is higher than 0.35 N*m/g, and a moisturizing mask prepared from the refined polysaccharides of abelmoschus manihot is high in moisture retention property, safe and environment-friendly. The waste abelmoschus manihot straw is taken as the raw material, waste is changed into wealth, pollution can be reduced, and great economic and social benefits are achieved.