Car body structure of light weight railway vehicle

The invention discloses a car body structure of light weight railway vehicle. The car body structure of light weight railway vehicle comprises a car body upper part bearing girder composed of two top cover long girders and two top cover side girders, two bottom shelf side girders as car body lower part bearing girder, framework structure composed by connecting the guest room door stand column, side wall support girder and cab door stand column to the car body upper part bearing girder and the car body lower part bearing girder; the framework structure is fixedly connected to the bottom shelf end structure, cab framework, end wall framework for forming the framework structure; the stressed-skin structure is composed of the arc top cover, top cover isolated wall, air conditioning baseboard, pantograph baseboard, bottom shelf baseboard and side wall plate between two top cover long girders; the top cover side girder and the bottom shelf side girder are fixedly connected through the integrated side wall support girder; the air conditioning baseboard and the pantograph baseboard are formed on the same platform at the same height; the bottom shelf side girder has the structure for hooking under the car. The weight of the vehicle body can be reduced for 1/10 while the structure strength is guaranteed.