The so-called historical acceptance of small property houses in Shenzhen refers to all illegal buildings left over from the urbanization history of Shenzhen, and all illegal buildings of different periods and types are included in the treatment category. The information investigation of illegal buildings left over from the history of rural urbanization refers to the information collection, input into the information base and standardized management of different types of illegal buildings in different periods in the process of rural urbanization, which provides a basis for the treatment of illegal buildings left over from history.