For　the　applications　of　technology　of　camera　calibration　to　binocular　stereo　vision　system,　the　camera　model　in　OpenCV　(open　source　computer　vision　library)　is　discussed,　the　non-linear　distortion　of　the　tangential　and　radial　distortion　aberration　is　considered.　Article　gives　an　arithmetic　of　camera　calibration　based　on　OpenCV.　This　arithmetic　makes　use　of　the　functions　of　the　library　effectively,　improves　precision　and　efficiency　of　computation,　and　has　a　good　property　for　the　application　to　multi-platform.　It　can　meet　the　needs　of　binocular　stereo　vision　system　and　other　computer　vision　systems.　©　2011　IEEE.