Shock is the most common complication in severe trauma patients;hypovolemic shock is the most common type but not the only one.This paper reviews the historical background and theoretical research on shock and discusses the incidence of various types of shock and multifactorial shock after trauma.In clinical prac-tice,it is necessary and very important to identify and intervene all types of shock in time,and guard against the pos-sibility of multifactorial shock.