The invention discloses an arch cambering method on a concrete road surface layer in a transformer station. The arch camber method comprises the following steps: (1) mounting of a side mould: a road side mould is fixedly mounted; the upper surface of the road side mould is inclined downward; (2) pouring of pavement concrete: plug-type vibrating spears are adopted to conduct full vibration in primary vibration; then arc-shaped vibrating beams are laid; concrete material is filled according to the interspace between the lower openings of the arc-shaped vibrating beams and the concrete surface; (3) vibration of arc-shaped vibrating beam surface layer; (4) sleeking and compacting: a polishing machine is adopted to conduct secondary sleeking and primary compacting after initial setting of the concrete intensity; (5) maintenance. According to the invention, the side mould is inclined outward at a certain angle to enable the surface of the side mould to be coincident with the slope of the pavement; the polishing machine can polish to the edges of the road; the phenomenon that pavement chromatism is easy to occur when secondary sleeking of the side edges is conducted manually is avoided.