不动产一物二卖这种不良现象普遍存在于现代社会生活中,不动产一物二卖这种不良的现象不仅破坏了良好的市场交易秩序,并且严重违反了民法中的诚实信用原则。分析不动产的一物二卖应当首先从其所签订的买卖合同的效力入手,本文对不动产一物二卖从合同法的角度进行了系统的分析。 Real estate one thing two sell this kind of undesirable phenomena are common in modern social life, the phenomenon of real estate one to two sold not only undermined the good market order, and seriously violated the principle of good faith in civil law. Analysis of real estate one thing two should start with the sale and purchase contract signed by the effectiveness of the start of this article on the sale of real estate one or two from the perspective of the contract law conducted a systematic analysis.