In this paper the change of optical absorption edge with temperature in three types of near infrared filter glasses is presented. It is proposed that the temperature coeffcient of optical absorption edge γ = dvg/dT characterizes this behaviour. The temperature coefficient γ of given three type glasses are measured first and are -2.5cm-1·℃-1 (HWB-4), -2.7cm-1·℃-1(HWB-80) and -3.9 cm-1·℃-1 (HWB-90) respectively. The physical conception of temperature coefficient γ is roughly discussed.