The utility model discloses fixing device for nameplate, including be used for fixing on the equipment connecting rod clamping mechanism with be used for that the installation marks the tablet mark the tablet frame, the last cassette that is equipped with of clamping mechanism, it has the cross section to be polygonal calorie of hole to open on the cassette, it is equipped with the bayonet lock on the tablet frame to mark, the shape of cross section of bayonet lock, size and the card hole is corresponding, it passes through the bayonet lock and can dismantle with the joint cooperation in card hole and fix to mark the tablet frame clamping mechanism is last. The utility model discloses set up clamping mechanism and marked the tablet frame, and can dismantle the connection between the two, consequently the utility model discloses when using, only need carry out one -time Setup, need to be changed when marking the tablet follow -up, do not need to dismantle whole device get off, need pull down and to mark the tablet frame and can conveniently change and mark the tablet, labour saving and time saving effectively improves work efficiency.