Abstract: The form of Unauthorized Disposition has been defined in "Property Law". The a uthor also investigates the conception and the current modes of real right chang ing ,and analyzes the creditor's rights pattern of modern china from the results and the three different theories about the validity of Unauthorized Disposition under this pattern. The author argues that the legislator should design the for m of Unauthorized Disposition by making the Unauthorized Disposition effective i n principle and the exceptions of validity.