Abstract: Online ride-hailing services play an extremely important role in our daily travel life. With the development of the times, more and more people are accustomed to using mobile phones to take taxis through network platforms, but sometimes passenger requests are not met for a long time, and drivers are unloaded for a long distance, which not only seriously affects the experience of passengers and dri- vers, but also reduces people's travel efficiency. How to better match passenger requests and the needs of no-load drivers has always been a key research focus of the on-demand ride-hailing platforms. The study of online ride-hailing order dispatch strategy will help reduce passenger waiting time, increase driver revenue, reduce the no-load distance of drivers, and improve resource utilization. This survey firstly describes the entire process from the passenger’s initiating a taxi request to time the order is responded to. Secondly, it introduces the order allocation strategy under different dispatch modes in detail. Finally, it comprehensively lists the evaluation metrics for order dispatch strategy.

Key words: online ride-hailing services, order dispatch strategy, passenger request, on-demand ride-hailing platform