Sulfanilamide crystalline powder can play a role in healing wounds, sulfanilamide crystalline powder has a wide range of antibacterial, can play a certain bactericidal effect can promote the healing of wounds, topical use needs to be carried out to clear the wound, and at the same time need to pay attention to the standardized care of wounds. Sulfanilamide crystals have a wide range of antibacterial, inhibitory effect on most gram-positive bacteria and gram-negative bacteria. Sulfonamides need to be thoroughly debrided when used externally to remove necrotic tissue, purulent fluid, etc., to avoid affecting the efficacy of sulfonamide drugs. At the same time, it is necessary to carry out standardized care for the wound to promote healing, keep the local dry and disinfect regularly. Sulfanilamide crystalline powder can play a certain role in promoting healing, but patients can not blindly use on their own, need to be under the guidance of the doctor for standardized operation.