Abstract: In accordance with the value orientation of the safety and speediness of trade a nd the principle of public confidence, the innocent purchase of the mortgage on movables is essential. The constitutive requirements of the innocent purchase of the mortgage on movables is special. It is a key question of the legal effectiv eness of the innocent purchase of the mortgage on movables to reasonably colloca te the right and the duty between the owner of the right of disposing and bona f ide third party.