The utility model relates to a break bar biasing means relates to glass processing equipment field. The main technical scheme who adopts does: break bar biasing means, it includes: the barrel, the first end of barrel is provided with the inlet port, the second end of barrel is provided with the mounting hole, the elasticity diaphragm, the elasticity diaphragm sets up will in the barrel the inner space of barrel falls into first cavity and second cavity, first cavity with the inlet port intercommunication, the depression bar, the depression bar sets up in the second cavity, the first end of depression bar with the elasticity diaphragm is connected, the depression bar with mounting hole sliding connection, the second end of depression bar stretches out the mounting hole predetermined distance. The utility model provides an it can be used for break bar biasing means exerting pressure to the break bar to the stability of the pressure on the break bar can be guaranteed to exert in scribingprocedure, thereby the practicality is suitable for more.