近几年的高考试题中,有很多涉及不等式的恒成立问题和存在性问题,不仅考查了函数、不等式等传统知识和方法,而且考查了导数等新增知识掌握情况和灵活运用,充分体现了能力立意的原则,越来越受到高考命题者的青睐.本文对恒成立问题的解集如何进行合理的处理进行了简明的阐述. In recent years, the college entrance examination questions, there are many involved in inequality of the establishment of the problem and the existence of the problem, not only examined the function, inequality and other traditional knowledge and methods, and examines the derivative and other new knowledge to grasp the situation and flexible use, fully embodies Ability to conception of the principle, more and more subject to college entrance examination candidates of all ages.This article concisely explains how to deal with the problem of constant set of problems.