The invention relates to a digital lock, in particular to a combined-control tuning device for a digital lock, in particular toa lock tongue or a locking/unlocking bolt plate. A locking plate is mounted at the locking end of the lock tongue or the locking/unlocking bolt plate; a hinging support is arranged at one end of a linking arm, and the other end thereof constitutes a moveable end; the locking plate is in sliding and clamping contact with the moveable end of the linking arm; and the linking arm is provided with a resetting device. Combined with the digital locks on the doors of various safes, vaults and arsenals, the invention mainly achieves the complete air isolation between the decoding tuning system of the digital lock and the locking/unlocking system of a handle, so as to control the operations in a uniform and harmonious way and perform the following unlocking procedures: 1. decoding; 2. dislocating; and 3. unlocking, thus preventing the code from being cracked by testing or preventing the lock from being technically unlocked; and the invention has the advantages of simple and compact structure, high security, simple and rapid locking and unlocking processes and reliable use.