Abstract: Location recommendation is an important application of location-based social network, Focused on the planning requirement for multi-user group social activities in urban area, and taking into account of urban road accessibility and user's time-cost of participation in activities, based on the characteristics of urban road network structure and navigation route planning, an algorithm for multi-user location recommendation has been suggested, in which the position is recommended in polygon region that is automatically recognized and constructed by making use of specific points in inter-user navigation route in support of map application programming interface, in order to balance the accessibility and time-cost from multi-user to recom-mended location. The validity of the suggested approach has been verified by a test system developed by the authors, this method can provide an effective location recommendation scheme for urban multi-user collective activities on location-based social networks.