The invention discloses a rapid access point switching method based on a dynamic access path selection mechanism, wherein, in a multi-hop relay broadband radio access network, each district exists a plurality of access points, including a base station and a delay station, a mobile user dynamically and rapidly switches to the access point of an adjacent district in a moving process according to the quality of a current radio channel with the aid of access path selection algorithm. By means of access point reselection, information such as the bandwidth, delay and hop count of a candidate access point path, and the current connection business type of the mobile user and service quality parameter thereof, the method of the invention selects the access path that satisfies current traffic condition from the candidate access points, and according to a best anchoring access point selected from business information obtained beforehand from a reserved network, the best access path is determined. When the mobile user needs switching, a target access point is switched rapidly, and the rapid access point switching method reduces switching delay, and different treatment on business with different priority improves switching connection rate.