Convenient chalk casing

The utility model provides a convenient chalk jacket, and aims at solving the problem that the length of the fixed chalk can be adjusted and the problem of skid prevention. The convenient chalk jacket mainly comprises a chalk jacket, a chalk, a fixing ring, a pushing rod, a handle and a skidproof film. The convenient chalk jacket is characterized in that the lower end of the handle is fixedly connected at the upper end of the pushing rod, the lower end of the pushing rod is nested in the upper end inside the chalk jacket, the lower end of the chalk jacket is fixedly arranged on the whole body of the fixing ring, the whole body of the skidproof film is sleeved on the outer surface of the chalk jacket.