The utility model discloses a trailer framework, including crossbeam and braking seat, the upper cover plate of crossbeam and apron down top forward extend and form a plurality of first extensions, and the top of each first extension is fixedly connected with braking seat respectively, and each braking seat hangs the place ahead of locating each first extension, the upper cover plate of crossbeamand apron down top backward extend and form a plurality of second extensions, and the top of each second extension is fixedly connected with braking seat respectively, and each braking seat hangs rearof locating each second extension. In this kind of trailer framework, because the relative position's between first extension, second extension and the crossbeam setting, the front upper place or theback upper place that make the braking seat can be located the crossbeam can increase the distance between braking seat and the ground to but enlarge arresting gear's installation space, reduce the structural constraint to arresting gear, be convenient for carry on arresting gear's installation operation. The utility model provides a trailer bogie including above -mentioned trailer framework.