Abstract: Based on the rock conditions and stress conditions of the pit loading chamber at the bottom of the Hongqinghe coal mine, the possibility of optimization of the chamber structure was analyzed, and the analysis methods of field investigation, numerical simulation and field measurement were adopted. This paper puts forward the design concept of "simple section, simple number, rational force" in the chamber. Through engineering practice, it is shown that compared with the traditional pit loading chamber, the above chamber design concept and layout form can greatly reduce the complexity of the chamber, simplify the pit loading chamber construction procedures, reduce the difficulty of construction, and improve the ability of the chamber to apply the change of surrounding rock stress. Meet the requirements of extra large coal mine skip loading chamber for space, safety, operation and working environment.