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This paper investigates the numerical deflection solution of the beam theory by using the mesh free method.In general,it is the very difficult to get the high order differential equation solution by using the mesh free method.This paper is using the point interpolation method and virtual boundary point method.This can increase the freedom of the system node.This can treatment the high order differential equation and the multi boundary condition.From the analysis result,this can be known that the number solution of the uniform force beam deflection by using the mesh free method is very close the exact solution.Therefore,this can be applied to solve the solution of the high order differential equation.