Preparation method of gel spray for wound repairing and gel spray

The invention discloses a preparation method of a gel spray for wound repairing and the gel spray. The preparation method comprises the following steps of (1) dispersing locust bean gum into deionized water, adding sodium periodate, carrying out stirring reaction at 30-45 DEG C for 4-8h, transferring a reaction liquid to a dialysis bag of which the molecular cut off is 5,000 for dialysis to obtain oxidized locust bean gum; and (2) adding the oxidized locust bean gum obtained in the step (1) and polyoxyethylene diphenacylamine to a calcium chloride water solution, carrying out ultrasonic treatment for 10-30min and standing to obtain hydrogel for promoting healing of a wound. The hydrogel is capable of effectively promoting healing of the wound; meanwhile, the hydrogel is safe and free of thrill, has good biocompatibility and is used for wound treatment, and is capable of fully absorbing percolate of the wound due to good hygroscopic property and maintaining the wound surface physiologically moist; meanwhile, t