Abstract: The project of main shaft loading chamber is one of the more important priority project in shaft building of first stage project, the construction technology is more complicated, it would be difficulty in task. In the position of Changchengwopo Mine Field, the geological conditions is more complex, multi-structure, loose lithology, joints development, and the surrounding rock level f is less than 3.The lithology structural strength is low, easy to separate and drop. On conditions of bigger chamber fracture surface, tougher surrounding rock characteristic, how to choose reasonable support form is the key factor to decide construction safety, construction speed and insure project quality.Therefore, through comparison study on several plans, combined support of bolt steel mesh shotcrete, anchor cable and concrete truss is adopted.