当物上保证人因为抵押权人行使抵押权而丧失其抵押物时，应当对其加以救济。
When mortgager loses the mortgaged property while claiming his mortgage right, he or she should he given compensation.
如将土地使用权抵押后再预售，银行一旦行使抵押权，将该土地使用权连同土地上新增房屋一起拍卖，买房人将面临有房无地的处境。
If after sale of land use rights collateral, the bank once exercise Mortgages, together with the land use rights to land new housing auction houses will face a situation of the housing landless.
本文分析了抵押权物上代位性的性质、事由以及如何行使，指出了抵押权物上代位性应注意的问题。
This paper analyzes the complex mortgage-bit behalf of the nature of the subject and how to exercise, pointing out that the mortgage-bit behalf of objects should pay attention to.
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