Chassis framework of vehicle

The invention discloses a chassis framework of a vehicle, and relates to the technical field of vehicles. The chassis framework comprises a framework front section, a framework middle section and a framework rear section which are connected in sequence; the framework middle section comprises a longitudinal beam and cross beams; the front end and the rear end of the longitudinal beam are connectedwith the framework front section and the framework rear section respectively; the multiple cross beams are arranged on the two sides of the longitudinal beam at intervals, so that multiple battery bins used for installing battery boxes are formed on the two sides of the longitudinal beam. The middle section of the framework is provided with only one longitudinal beam; the longitudinal beam and theplurality of cross beams can be assembled into a plurality of battery bins; therefore, the available space of the middle section of the framework is fully released, all the battery boxes can be distributed in the middle secti