The present invention is applicable to the field of logistics distribution technology and provides a method and a device for dispatching courier orders based on the same-city courier. First, couriers within a preset distance from a dispatching place are selected as a first set of candidate dispatching couriers. Secondly, from the first set, screening out the candidate dispatching couriers whose dispatching amount limits supported by their dispatching tools are smaller than the freight weight as a second set of candidate dispatching couriers. And then an order dispatching score formula is used to calculate the order dispatching score of each candidate courier, and based on the scores of the order dispatching ranked from the high to the low, the courier with the highest matching degree in the second set is determined, and the order is assigned to the courier with the highest matching degree. The method for dispatching courier orders provided by the invention mainly considers the impact of the influence factors such as the weight of the freights, the dispatching tools and the dispatching distances on the dispatching efficiency of the couriers so as to select the most suitable courier nearby for dispatching and distribution, therefore, making the assignment of the orders more reasonable and increasing the order dispatching efficiency to couriers.