二十世纪二三十年代的上海房租一直处于居高不下的状态,有关上海房东与房客之间的加租与减租的冲突一直不断。本文试图从“变态”这一角度去解析上海房租在这一时间段内处于这种状态的原因。变态下的因素有战争爆发和经济危机。上海房租是在常态与变态两种因素同时作用下的结果,变态因素在之中发挥了不可忽视的作用。 Shanghai’s rent in the 1920s and 1930s remained at an all-time high and the clashes between rent-increase and rent-reduction among Shanghai landlords and tenants continued. This article tries to analyze the reason why Shanghai rent is in this state during this period from the perspective of “metamorphosis ”. The perverted factors are the war broke out and the economic crisis. Shanghai rent is the result of the simultaneous action of both normal and abnormal factors, and the abnormal factors play a non-negligible role.