Double key lock core

The utility model relates to a lock core with two keys, the current lock core is single key type, which can be easily hitched or unclenched so as to be not safe, the utility model aims at designing a lock core with two keys consisting of three layers of a core shell, a main lock core and a safe core. The safe core(6) is arranged inside the main lock core(9), one of the two cores must be bigger than the other one. The marbles in the lock core must be arranged at least three routes, which are unlocked by two sheet of keys respectively, the subsidiary length sum of the first, the third and the forth route must be bigger than the thickness sum of the main lock core and the safe core, so that when the lock is in B key state, to protect the safe core and the main lock core do not rotate. The utility model has the advantages of good function of preventing hitching and unclenching, safe reliability, and the utility model is suitable for important safe place and appliance of vehicle doors, safes and vault doors.