A preliminary experimental investigation on the effect of thrust augmentation on Pulsed Detonation Engine(PDE) performance was performed.Two different thrust augmentation geometries were designed and tested.The results show that in average more than 50% thrust increment could be gained under rational construction parameters.Analysis of the mechanism of thrust augmentation and the influence of different construction parameters on thrust improvement was performed.These results offered basic reference for design optimization of the PDE thrust augmentation.