Abstract: Projection pursuit technique,being good at reflecting researcher's purpose,dealing with high dimension and non-normal data,is a new type of statistics technique combining statistics idea with high performance computer.But it has also brought some trouble to practical study because of its parameter setting,optimization algorithm selecting,computer programming and the final ranking.This article aims to evaluate the schoolhouse defense capability against lightning risk by using this technology and then discuss the sticking point and difficulties in applying projection pursuit,presenting some reasonable explanations and corresponding solution of it.