In this paper, we have proposed the efficient anti-aliasing algorithm for mobile vector graphics. We can have greatly reduced sample counts by selective multi-sampling, which uses multi-sampling only for the pixels which meet the contour of the image. We can find the multi-sampling pixel by simple pixelprimitive intersection test. To reduce the cost of intersection test, we have proposed the pixel block algorithm which processes adjacent pixels together. For more optimization, we use hierarchical sampling. Our optimized S-MSAA (Selective MultiSample Anti-Aliasing) is 29.4 times faster than the original 16× MSAA.