Abstract: Several hundred years history of the constitutional government has already expressed that the property right is the premise lead to political right,and the sill of the constitutional government democracy.The constitution revision bill has already established“the private possession be free from the invasion principle”in 2004.The administrative law as one of the section that carries through the implement constitution completely, with important mission towards carrying out the constitution principle taking.But the scope of private property right is comprehended narrowly in the current administrative law realm,causing the private party can't get a valid protection.Therefore it is necessary to deeply introspect the body scope of the private property right in administrative law.