Abstract: Abstract: In order to speed up the construction speed of super-large skip loading chamber, segmented, stratified excavation and permanent support are used to locate the arch-legs, and material planning and machining are carried out according to the positioning, so as to avoid the improper position of the arch legs which will affect the construction speed and simplify the construction process. The construction of the cavern is efficient and safe, and it can be used for reference to the construction of the same super-large chamber.