The principle of RF driver for high power acoustooptic Q switch has been presented and the necessity of electromagnetic compatibility design for RF driver has also been discussed. The design method has been given from the view of components selection, PCB design, filtering, grounding and shield etc. The electromagnetic radiation of the driver designed by the proposed method has been improved significantly. Under the same operating conditions, the electromagnetic radiation at working frequency is reduced by 14 dBm than the previous product.