The hot-melt marking coating of thermoplastic road marking paint is solid powder under normal temperature. During the construction, the thermoplastic striping paint coating is put into the melting kettle, the temperature in the kettle is controlled between 180 ℃ ~ 210 ℃, and the coating is melted while stirring. After the melting is in the melting flow state, it is put into the insulation melting hopper of the marking car. The melting coating is then led back into the marking bucket, and the heat preservation keeps the material in the melting state. Pre marking machine shall be used to mark the position before marking, and primer shall be applied with lower coating machine according to the application position indicated in the design drawing. After the lower coating agent is completely dry, the marking coating can be applied. At the beginning of marking, the marking bucket shall be placed on the road surface. Because there is a certain gap between the marking bucket and the ground, when the marking car is running in front, a neat marking line shall be scratched by automatic flow. The glass bead spreader can automatically and evenly spread a layer of reflective glass beads on the marking line.