从未知到已知,这是进,也是我们解题的目的,然而,在很多问题的解决过程中,为了达到“进”的目的,而不得不“退”下来.华罗庚曾说过:“善于‘退’足够地‘退’,‘退’到原始而不失去重要性的地方,是学好数学的一个决窍.”以退求进是解决数学问题的辩证思维,是研究问题的一般方法,本文拟从几方面来浅述以退求进这种辩证思维在解题中的应用. From the unknown to the known, this is the purpose of our solution. However, in the process of solving many problems, we have to “retreat” in order to achieve the goal of “advancement.” Hua Luogeng once said: “Good at “Retreat” enough to “retreat” and “retreat” to the original place without losing importance is a key to learning mathematics. "To seek progress is to resolve the mathematical problem of dialectical thinking, is a general approach to the study of the problem, This article intends to briefly explain the application of this dialectical thinking in problem solving from several aspects.