Abstract: To avoid the emergence of such dead locks, in referring to the theories of session management in operation systems, we put forward an extended locking method for topologically spatial entities to implement the synchronization and mutex between locking and unlocking transactions. It avoids the expenditure of detecting dead lock and rolling back and makes the system more efficient. In addition, the queue mechanism within the extended locking method keeps the system in a good order. The test shows that the extended locking technique makes the spatial database management system better in order and more efficient under a multi-user environment only with some time consumption of managing logical codes.