本文首先对国际通用的判断房价是否合理的房价收入比公式的缺陷进行了系统分析。然后,对其作了修正,给出了更加合理的分阶层房价购买力比公式。借助于新公式,本文对上海目前房价是否合理及上海房地产市场中的“低价房悖论”等问题进行了深入剖析,并提出了相应的对策和建议。 This article first systematically analyzes the defects of the formula of house price income ratio, which is commonly used to judge the price of housing in the world. Then, it is amended to give a more reasonable formula for purchasing power ratio of housing prices. With the help of the new formula, this paper analyzes the current reasonable housing prices in Shanghai and the “paradox of low-cost housing” in Shanghai real estate market, and puts forward corresponding countermeasures and suggestions.