Extended square cabin

The invention relates to an extended square cabin. The extended square cabin comprises a fixed cabin body, wherein one or more extended cabin bodies capable of being pulled are installed on one side or two sides of the fixed cabin body, a plurality of slide rails capable of moving the extended cabin bodies to the outside of the fixed cabin body are arranged at the bottom of the fixed cabin body, each slide rail comprises a fixed slide rail arranged inside the fixed cabin body and a movable slide rail correspondingly arranged on the outer side of the fixed cabin body, the other end of the movable slide rail is provided with a support ground foot, and the movable slide rails are configured to jointly form the slide rails for the extended cabin bodies to move with the corresponding fixed slide rails in an unfolded state and to retract and fixed on the fixed cabin body when the extended cabin bodies are in a retracted state. According to the extended square cabin, the bearing capacity of the extended cabin bodies