In this paper,PbMoO4 and TeO2 normal acousto optical deflectors with center frequency of 100 MHz and operating at laser length of 0.632 8 μm.The size design parameters of two deflectors are given.The characteristics of deflectors are analyzed through maximum diffraction efficiency,bandwidth,transit time and other performance characteristics and curves obtained from the simulation of two deflectors on MATLAB software.The simulation result shows that TeO2 deflector has an improvement on characteristics comparing with PbMoO4 deflector.