The components and stepping mechanism of slidingtype stepping system of open TBM are introduced in detail. And then the requirements of slidingtype stepping technology on stepping tunnel, launching tunnel, stepping tunnel of preprocessed bad geological section and maintaining tunnel are summarized. Finally, the operation process of launching and receiving of slidingtype stepping technology, issues should be paid attentions to during stepping and stepping effects are summarized and the advantages and disadvantages of this kind of stepping system are presented. The results can provide references for early infrastructure and TBM stepping of similar projects in the future.