The invention provides a three-dimensional city-model rapid updating method. The method comprises the following steps of S101, collecting street view photos of different visual angles of changed areas in a three-dimensional city; S102, analyzing a three-dimensional city model and positioning an area of the changed areas in the three-dimensional city model; S103, according to buildings in the three-dimensional city model, establishing an image characteristic database; S104, carrying out three-dimensional space change detection on the three-dimensional city and determining the updated and reconstructed building; S105, carrying out characteristic matching on the street view photos of the different visual angles; and S106, carrying out precise integration on the updated and reconstructed building and a background three-dimensional model. The three-dimensional city-model rapid updating method is based on existing three-dimensional city data. An invariant in existing old data is taken as a precision source of updated data correction so as to carry out precision control on new data. Therefore, a common street view photo image correction problem is solved.