Abstract: Due to the unstable dose of micro focus CT ray source, detection and acquisition noise and multi-energy spectrum ray, the CT image of aeroengine precision parts inevitably contain noise and artifacts. Therefore, image enhancement processing is of great significance. The beam hardening effect causes cup artifacts in the reconstructed images, in order to eliminate this effect, a simple and practical correction method was proposed. Firstly, the logarithm of the collected data was taken, and then the difference with the air lograithm value was made to obtain the integral of the multi-color beam attenuation coefficient. Secondly, the parameters of power function transformation curve was set and hardening correction was carried out. Finally, convolution back projection reconstruction was carried out. In order to further reduce the noise in the image, the anisotropic diffusion filtering model was used to denoise the image. Experimental results show that the proposed method can significantly improve the CT image quality and reduce image artifacts and noise.