Bean dregs contains lots of fiber and calcium while just little fat, so it is of high nutritional value. In order to expand the utilization of bean dregs and improve the economic value of soybeans, by using fresh bean dregs as raw material to confirm the optimum conditions for extracting bean dregs soluble dietary fiber through the study on the dosage of enzyme, temperature, time and pH. The result shows that it can get the maximum extraction rate of 4.56% with the condition of 0.5% of the dosage of enzyme, 100 min of the reaction time, 48 ℃ of the reaction temperature, 4.3 of the pH. Then use tensile strength of film as index to conduct study on the impact on performance of the edible wrapper of bean dregs with different dosages of sodium alginate, CMC, glycerol and mixed soluble dietary fiber above. The result shows that it can get the best tensile strength of film of 7.42 MPa with 2.0 g soluble dietary fiber, 1.5 g sodium alginate, 0.5 g CMC and 1.5 mL glycerol through Orthogonal experiment.