Abstract: This article deals mainly the maximization of charity behavior in the view of economics. After a short review of the field,it covers a workable definition of charity behavior and a discussion of the three basic conditions based on which charity behavior produces. In the economic analysis.it first explains why the economic anlysis unit is a single person, the content of economic analysis,and points the challenge that economic analysis faces; then, in detail discusses why the method of wealth shift can not add value to the whole social benefits;finally,analyses how to maximize the charity behavior,and puts forward five suggestions, efficiency maximization of personal donation, reducement of personal income tax rate, improvement of efficiency of charity fund and no interferece in charity market from govenment.