There are many kinds of road marking machines in existence, which need complicated manual operation, and the drawing graphics are limited. Different drawing methods and tools are needed for different sizes of graphics. The larger size of the diagram requires more than one worker to cooperate, manual marking, and is easy to be limited by time and environment, which has a great impact on the normal road traffic. This design gets inspiration from the ink-jet printer. Through the rotatable nozzle, a machine can draw any size of marking line at the same time. The fully automatic intelligent electric road marking machine also liberates the hands of the staff, so that the marking work is no longer affected by the time environment, and improves the road traffic efficiency.