Abstract: In view of the huge gap of the performance for animation rendering between the different browsers, designed a high efficient algorithm for SVG animation rendering, which is to merge the animation and operator from multi to multi to one to multi.and reduced the count of the invoking of the basement of browser.the algorithm、the consumption of system resource.Besides, the algorithm introduced the frame adaptation algorithm, which improved the compatibility for the browsers which is not optimized for animation rendering, and enhanced the performance of browsers which has optimization.so, the algorithm ensured the high efficient and stability between different browsers, Experiments show that the rendering algorithm, whether or not on the browsers which has the optimization of the animation rendering, can smooth the performance jitter, reached the idea efficiency the browsers can ever reached in the current situation, and support the large amount of SVG animation rendering.