本文从一道不等式例题出发,得出“以退求进”策略是发现数学类比题的重要工具,并在此基础上探讨了数学解题的发现美与策略美. Starting from an example of inequality, this paper concludes that the strategy of “withdrawing backward from entering” is an important tool for finding mathematical analogy questions, and on this basis, it discusses the discovery beauty and strategic beauty of mathematical problem solving.