This paper instroduces an electro-optic shutter made of PLZT 9.2/65/35 ceramic wafer having quadratic transverse electro-optic effect. It can be used in bifrequency laser. Temperature stability at Vπ of PLZT is good and the change rate of Vπ with temperature for PLZT ceramic device is about 0.5%/℃. Practical application, for example in a JD-16 three meter laser length-measuring instrument demonstrates that it is not necessary to orient the axis direction of ceramics in advance. Besides, this device has the adventages of small size, good stability, easy operation and low cost.