The invention relates to the technical field of road cold-spraying and scribing, in particular to a road cold-spraying and scribing spraying machine. The road cold-spraying and scribing spraying machine comprises a vehicle frame, wheels are installed at the bottom of the vehicle frame, an air compressor is installed at the upper end of the vehicle frame, a paint tank is fixed to one side of the air compressor, a spray pipe is connected to one side of the paint tank in an inserted mode, a spraying mechanism is arranged at one end of the spray pipe, a guiding wheel is fixed to the lower part ofthe spraying mechanism, and the spraying mechanism comprises a fixing rod, a clamping piece fixed to the top end of the fixing rod, a guiding rod arranged inside the clamping piece, a sliding block connected to the upper part of the guiding rod, a connecting rod connected to the top end of the sliding block, and a clamping ring arranged on the outer side of the connecting rod. According to the road cold-spraying and scribing spraying machine, the sliding block moves on the guiding rod, thus a spray head can be replaced to the left part and the right part of a machine body, the road cold-spraying and scribing spraying machine adapts to the personal eye using habit, thus pre-aiming is more accurate, and working is smoother; through shielding of the guiding wheel, admixing of dust is avoided,meanwhile, the guiding wheel facilitates guiding, and wire-passing bending is avoided; and the spraying quality is improved, the service life of a spraying line is prolonged, and the cost is saved.