This　article　proposes　a　dial　digital　character　location　algorithm　based　on　canny　edge　detection　and　the　dial　multiple　features　under　complicated　background.　The　algorithm　includes　three　principal　steps:　Firstly,　using　Canny　edge　detection　operator,　combined　with　the　characteristic　of　the　dial　plate,　the　geometry　algorithm　for　segmentation　of　the　image　of　dial　quickly,　then　using　the　Hough　transform　for　arbitrary　angle　of　tilt　correction,　finally　the　dial　digital　character　positioning　is　realized　by　using　projection　method.　The　experimental　results　show　that　the　method　can　accurately　locate　various　dial　characters　under　complex　background,　provide　the　basis　for　subsequent　reading　of　automatic　identification,　the　effect　is　stable　and　effective.