Crankshaft turning device

The utility model relates to a crankshaft turning device. A main body consists of a platform and two symmetrical supports arranged at the front end of the platform; and the crankshaft turning device is characterized in that: a flange is arranged between the two symmetrical supports, is connected with the front end of the platform through a couple axle, and has a regular octagon shape; two opposite sides on the upper part of the flange are provided with positioning holes; two opposite sides on the lower part of the flange are provided with positioning frames; the middle of the flange is provided with at least three soft positioning blocks which are distributed in the middle of the flange in a circular array; filling wood blocks are arranged in the positioning frames; and wedged wood blocks are arranged on the front of the upper ends of the filling wood blocks. By the structure, when a crankshaft is turned, the crankshaft is hoisted to the flange and fixed by the positioning frames, and a crankshaft journal is