Based on the study on the boring of Shiziyang tunnel on GuangzhouShenzhenHongkong Railway in highpressure, waterrich and complex strata by largediameter slurry shields, the authors summarize the chamberentering technologies in different strata, including hyperbaric operation, normobaric operation, normbaric operation under consolidated strata and operation under low pressure. They present the selection methods, application scopes and key points of these chamberentering technologies in complex strata in detail. This paper can provide references for similar projects.