Road surface cleaning and maintaining all-in-one machine

The utility model relates to a road surface cleaning and maintaining all-in-one machine which comprises a vehicle body, a cleaning unit and a maintaining unit, and the maintaining unit comprises a maintaining agent storage tank, an output pump, a main conveying pipeline, a discharging transverse pipe and a plurality of maintaining agent spray heads. A linear module parallel to the discharging transverse pipe is fixed to the lower surface of the tail end of the horizontal supporting plate, a sliding block of the linear module is connected with a C-shaped frame, the C-shaped frame is provided with a bottom plate connected with the sliding block, a top plate located above the horizontal supporting plate and a vertical plate connected between the same side of the bottom plate and the same side of the top plate, and the lower surface of the bottom plate is connected with a right-angle pipe connector through a connecting column. And the upper end of the right-angle pipe joint is connected with a branch pipeline of