民事权利作为民事主体依据民事法律取得的可以实施一定行为、获取一定利益的资格,在现实生活中无处不在。人们的权利意识日益增强,民事权利应当受到保护。但是,民事权利有时会发生冲突。当事人为实现抵押权对抵押房屋进行买卖时,对该房屋上的租赁权有无影响?承租人的优先购买权又该受到怎样的限制? Civil rights, as a civil subject, obtained from civil law, can perform certain acts and qualify for certain benefits. It is ubiquitous in real life. People’s awareness of rights is increasing day by day, and civil rights should be protected. However, civil rights sometimes conflict. Does the parties have any effect on the tenancy rights of the mortgaged property when the mortgaged property is bought and sold by the mortgagor and what limits should be imposed on the lessee’s preemptive right?