The invention belongs to the field of municipal road facilities, and in particular relates to a municipal road traffic warning light, which includes a base, the upper end of the base is fixedly connected with a threaded rod, the upper end of the threaded rod is fixedly installed with an incandescent lamp, and the side wall of the threaded rod A plurality of triangular prisms are fixedly connected to it through a support rod, and the triangular prisms are on the same level as the incandescent lamp. The external thread of the threaded rod is sleeved with a rotating sleeve, and a light-shielding ring is fixedly connected to the side wall of the rotating sleeve. The light-shielding ring is set outside the prism, and the light-shielding ring is composed of a plurality of single-color transparent film plates. The present invention can replace the astigmatism lamp with an incandescent lamp, deflect the incandescent light into red, orange, yellow, green, blue, indigo, purple and other monochromatic lights through the prism, drive the shading circle to rotate through the wing plate, and play the effect of the flash lamp, and the cost is low. It is relatively low, which is convenient for timely maintenance and replacement of the light source. Through the shading strip, the warning light also has a high degree of recognition when the sun is strong, ensuring its warning effect.