The invention relates to a safe lock which comprises a complex pin tumbler arranged on an idle lock or a non-idle lock without a lock cylinder or with the lock cylinder, making contact with a key, combined by at least two pin tumblers through contact or contact with a spring or magnetic contacting, and having a linkage or restrictive function. When one pin tumbler in the complex pin tumbler moves, at least one other pin tumbler moves certainly, and only if all pin tumblers in the complex pin tumbler are in an unlock state, the complex pin tumbler can be in an unlock state; when a part, on at least one pin tumbler in the complex pin tumbler, making contact with the key, is interlocked in a key hole, the part needs to enter a non-key hole so as to be in an unlock state during unlocking; when a part, on at least one pin tumbler in the complex pin tumbler, making contact with the key, is interlocked in the non-key hole, the part needs to enter a key hole and makes contact with the key so as to be in an unlock state during unlocking; and the lock can be opened. The lock solves the problems that a pin tumbler, on an existing lock, contacted with the key, cannot be burglarproof, and unlocking can be realized through damaging the lock.