Discloses is a lock structure for a drawer. The lock structure comprises a position detector, a processor, a driving mechanism, a static lock hook and a movable lock hook. The position detector and the driving mechanism are both in electrical connection with the processor. The static lock hook is installed on a back plate of the drawer. The driving mechanism is connected with the movable lock hook. When the drawer is closed, the static lock hook and the movable lock hook are connected with each other in a buckle mode. The processor is used for controlling the driving mechanism to drive the movable lock hook to rotate and leave the static lock hook according to an opening electrical signal. The position detector is used for generating a drawing-out electrical signal when it is detected that the drawer is drawn out. When receiving the drawing-out electrical signal of the position detector, the processor controls the driving mechanism to drive the movable lock hook to rotate to reset so that the drawer is pushed in and closed, and the static lock hook and the movable lock hook are connected with each other in a buckle mode again. According to the lock structure, the opening electrical signal is sent to the processor to achieving automatic unlocking of the drawer without using of a key, so that management is convenient and fast, and the lock structure is specifically suitable for a cabinet with multiple drawers.