The invention discloses an adjustable anti-misoperation device, which is composed of a movable plate and a fixed plate, wherein the movable plate is provided with a longitudinal adjustment opening anda combination baffle plate, the fixed plate is provided with a mounting hole and combination adjustment openings, and the movable plate can translate or rotate within a certain range relative to thefixed plate, so that the locking range of the device is enabled to be extremely wide. The adjustable anti-misoperation device is simple and practical and can solve a problem that there is no suitablelocking device for a switch cabinet grounding knife connector, thereby reducing potential safety hazards, and providing greater guarantee for the safety of the staff.