Abstract: In view of the hypothesis of upset plate move bearing and gas dynamic equation in explode,blast wave equation is made up,and explosive gas action is thought vertical reflection on fixed wall.So confine of valid exponent is yet deduced.It is reliable supply for practical engineering.2^# rock nitramon and petnaerythritoltetranitrate or trinitrotoluene explosive is used to weld aluminum upset plate and mild steel base plate,the equation upset plate and explosive thickness can be deduced from Richter equation.It is effectual for being used in practice by example of analysis.