1.5 μm waveguide acoustooptic tunable filter has been stuidied and fabricated. The SAW waveguide is used to reduce the RF driving power. Tunable optical filtering was realized over the whole 1.5～1.6 μm range. Optical band width of the device is with in 2 nm. The RF driving power need to obtain 97% conversion efficiency is nearly 80 mW(19 dBm) and the device total insertion loss is about 9 dB.