涉及到分式不等式的证明问题,大多构思新颖、别致,结构匀称美观,能很好地考查学生的观察能力、运算能力、创新思维能力,但学生常常对此类问题“一筹莫展”,本文利用中学生熟知的均值不等式给出解决这类问题的常见策略． Regarding the proof of fractional inequality, most of them are novel, unique, and well-structured. They can well examine students’ observation ability, numeracy ability, and innovative thinking ability. However, students often “do nothing” about such problems. This article uses middle school students. The well-known mean inequality gives a common strategy for solving such problems.