Abstract: In view of problem of higher requirement for safety factor in shaft operation, a blocking function of leakage communication and shaft hoist signal was developed, which was used to realize blocking and unlocking operation for hoist signal by dotting of hand-held interphone of leakage communication in maintenance process of shaft. Implementing schemes through two ways namely reforms of hoist signal system and electrical and control system of hoist were introduced in details. The actual application shows that operation personnel of shaft can participate in hoist control directly and can block hoist signal when need not startup, which improves safety in shaft operation.