Abstract: Self-determination is one of the basic princrples for the operation of property night from the angle of philosophical ethics.The principle of self-determination for property right is brought forward basing on the characteristics of property right and the main reguirements of social ethical value.It is the fundamental provision for the main body's moral rights,ethical duties and aims in the arrangement of system and activity of property right.It mainly includes the following three ethical proussions:free use of property night,freedom of property right trade,and some favourable development.

Key words: property right, the ethic of property right the principle of self-determination