The invention discloses a method for treatment of silk degumming wastewater and recovery of silk gum. The method comprises the following steps of: (1) primarily filtering the wastewater; (2) settling the wastewater by using an acid separation method to divide the wastewater into supernatant and lower sediment; (3) pouring the supernatant through an ultrafiltration membrane to obtain first filtrate and first concentrate, diluting the lower sediment with de-ionized water and allowing the sediment to pass through the ultrafiltration membrane to obtain second filtrate and second concentrate; (4) combing the first filtrate of the supernatant and the second filtrate of the lower sediment and further filtrating the combined filtrate with a nanofiltration membrane to obtain wastewater filtrate and third concentrate; and (5) combining the first concentrate and the second concentrate in the step (3) and the third concentrate in the step (4) and then performing spray drying to prepare silk gum protein powder. The recovery rate of the silk gum is as high as 99 percent; and the finally obtained filtrate meets national emission requirement and has environmental friendliness.