Scribing support

The utility model provides a scribing support which is convenient to use and capable of achieving 360-degree scribing for a crank shaft. The scribing support comprises a support body and the crank shaft. Two idler wheels, a locking pipe and two locking blocks are arranged in the support body, wherein the two locking blocks are located below the two idler wheels, the locking pipe is matched with the idler wheels, the outer side of the locking pipe is provided with a threaded handle, the threaded handle is rotated and the locking pipe can be driven to fix the locking blocks. The crank shaft is lifted to the idler wheels of the support, the threaded handle is rotated to drive the locking pipe to fix the locking blocks, after the locking blocks are fixed, the two idler wheels cannot rotate, the crank shaft is under a static state, scribing can be conveniently carried out, and additionally, if the handle is loosened, the crank shaft can rotate 360 degrees on the idler wheels.