This paper focuses on the way for no-reference objective video quality assessment based on de-compressed domain of mobile multimedia broadcasting, it analysis the blocking artifacts and blurring algorithm of damaged image with different test sequences at different compression rates, and uses the linear-weighted methods to estimate the value of objective evaluation of video quality. The experiment's results show that: the no-reference objective assessment value calculated by this algorithm has a strong correlation with PSNR, and it can be used for end users' video quality assessment.