Marking device for road construction

The utility model discloses a marking device for road construction. Including an outer cylinder, four rubber stop blocks are fixedly connected to the inner surface of the outer cylinder at equal intervals; an inner cylinder is movably connected into the outer cylinder; a discharging hole is formed in the outer surface of the lower end of the inner cylinder, a rubber plug is movably connected intothe inner cylinder, a first vertical rod is fixedly connected to the center of the outer surface of the upper end of the rubber plug, a second vertical rod is movably connected to the upper end of thefirst vertical rod, and a push plate is fixedly connected to the outer surface of the upper end of the second vertical rod. The utility model discloses a device, discharging holes with different holediameters are utilized; when the device is used, the scribing thickness can be adjusted, scribing operation can also be conducted on an uneven road surface where a scribing machine cannot be used, the length is adjusted throug