研究目的：线网规模的合理性直接关系城市轨道交通建设与运营全生命周期的总体效益，是轨道交通线 网规划的核心指标。针对已有线网规模不同计算方法结果存在明显差异、解释不全面、各方法计算结果无法 综合的问题，本文提出一种基于熵权的轨道交通线网合理规模计算模型。 研究结论：(1)在梳理已有城市轨道交通线网合理规模概念的基础上，进一步深化和明确合理规模的具 体含义和外在表现;(2)基于线网规模服务水平分析法、出行需求分析法和回归分析法，运用信息熵对三种方 法结果进行客观赋权，全面确定线网规模合理值，有效提升线网规模的合理性;( 3)将该模型应用于重庆市城 市轨道交通线网规模实例分析中，得出的结果表明：2020年合理规模值应为570. 61 km，实际规划存在调整优 化空间;(4)该模型能够分析计算各城市轨道交通线网合理规模综合取值，为我国城市轨道交通线网规划提 供理论支撑。

Research purposes ： The overall efficiency of urban rail transit construction and operation of the whole life cycle is directly related to the rationality of networl^ scale，and the rationality is the core index of rail transit networl^ plan. Aiming at the problem that there are obvious differences，one - sided interpretation，and difficult combination in different network scale calculation results，the model of the reasonable scale of rail transit network calculation based on entropy weight is put forward. Research conclusions ：( 1) Based on summarizing the concept of the existed urban rail transit network reasonable scale， further deepening and clarifying the specific meaning and external performance of rational scale. (2) Based on the service level analysis of network scale， the results of the three methods are given a treatment of valuation by using information entropy，and thereasonablevalueof network scaleis determined amply，effectively enhancing therationality of network scale. ( 3 ) The model is applied on the case of network scale of cityrail transit studyin Chongqing，and the results show that tlie reasonable scale value should be 570. 61km in 2020，so there is still tlie space of adjustment and optimization in the actual plan. (4) The model can analyze and calculate the comprehensive value of each urban rail transit network reasonable scale，providing the theoretical support for the urban rail transit network plan in China.