The invention relates to a mechanical/electric selective controllable drawer locking device, which is formed by independent mechanical controller, electric controller, and shared locking operator. Wherein, the lock rod of mechanical controller is connected to the lock pin end, while its top is bent; the unlocking plate has a long bar hole, a R-shape boss and a bent plate with waist-shape hole; the support element of unlocking plate has a limit boss; the electromagnetic valve of electric controller has a controllable sliding head; the hook plate of locking operator has a lock hook and a limit projection edge; the lock hook mounting bracket has a unlocking element and a spring mounting bracket; the eccentric rotational shaft and limit rotational plate are mounted between the rotational shaft base plates with limit cuts on the edge; the invention via the limit condition of limit cut and limit rotational plate decides the limit locking condition between the lock hook an the drawer lock. And there are two selective controllable methods to control the motion of locking operator, and it can improve the safety and reliability.