Shock is a comprehensive pathological process characterized by acute circulatory disorder, especially microcirculation disorder, which occurs when the body is stimulated by excessive intensity or seriously injured. Clinically, sick pigs are characterized by sudden drop in body temperature, pale mouth, chills in ears, nose and limbs, weak pulse, shallow breathing, muscle weakness, slow response, high depression and even coma, accompanied by a series of symptoms such as hypotension, which often leads to death if not treated in time.