To enhance the heat insulating property of a grooving pavement to melt accumulated snow in a short time.

Ceramic hollow small balls are sprayed into a groove 2 formed in a pavement surface 1 at a high pressure of 100-250 kg/cm2, and the hollow small balls are deformed into popcorn shape and mutually bonded to form a highly heat resisting paint film. The temperature of the surface is raised by the heat insulating paint film to facilitate the melting of the accumulated snow, and the freezing is also prevented.