Lock structure for sliding door

The utility model relates to a lock structure for a sliding door, which comprises elements of an inner-outer handle seat, an inner handle, an outer handle, an inner-outer lock bolt set, a latch device, a lock core device, an auxiliary lock knob, etc., wherein the inner and the outer handles are pivoted with the inner-outer handle seat. When the inner handle is operated, the blocking state of the inner and the outer handles are removed, a latch head which can draw back the latch device so as to open a door leaf, and the outer handle removes the blocking state of the handle through the lock core device so as to open a door; users can also operate the inner and the outer handles or the blocking state through the lock core device outside the door or through an auxiliary lock knob inside the door so as to control the opening or the blocking of the door leaf.