Electrical contact injury, that is, the injury caused by the direct passage of electric current through the body. Not only deep damage, sometimes can make a large piece of tissue or limb charring, and even immediately endanger the life of the injured. First aid should immediately cut off the power supply, first aiders remember not to touch the casualty, so as not to electrocute themselves. After the fire, if the casualty is found to be in respiratory arrest, the scene should immediately perform external cardiac massage and mouth-to-mouth artificial respiration resuscitation, after the recovery of heartbeat and respiration, promptly transferred to the nearest hospital for further treatment, or continue CPR at the same time, the casualty will be quickly transferred to the nearest medical unit for treatment.