The uncertainty of limits of subject in Law of Individual Sole investor Enterprise causes the difficulty of legal administration of some enterprises.

This paper introduces the conception of the one-person corporation, compares the differences between the one-person corporation and the personal sole corporation, expounds the institutional framework and supervisory mechanism of the one-person corporation, and points out the legal existence of the one-person corporation and the necessity of normalizing its operation.

This text will compare a person s limited company and personal proprietorship from nine respects,analyze the two difference,thus offer reference for choice of operator s type of operation.

In the present context of market interest subjets diversified development, sole proprietorship s civil subject status should be established.

On legal problems of investor in individual proprietorship;