Because of using the two-way wave equation and zero-lag cross correlation imaging condition,RTM causes unwanted artifacts.In this paper,the authors introduced a denoising method using the Poynting vector,which is one of the methods denoising the artifacts of reverse time migration.This method utilizes the difference between normal and abnormal imaging points in angles between the source and the received wave propagation direction, which is based on the uniformity between the direction of wave propagation and its Poynting vector.As for calculating the Poynting vector,the authors smoothed the Poynting vector for those unable to use the formula and employed CPU/GPU heterogeneous parallel computation for intensive computation cost.Through the two-layer velocity model and Marmousi velocity model denoising image with different denoising angle ranges,the authors have reached the conclusion that the smoothing method used in this paper can improve the stability of Poynting vector calculation,that the application of CPU/GPU heterogeneous parallel computation can reduce the time of calculation,that the two-layer velocity model with the 70° max denoising angle is better,and that Marmousi with the 100° max denoising angle is better.