The utility model discloses a heat-dissipating waterproof LED road lamp. The heat-dissipating waterproof LED road lamp comprises a top plate, a reinforcing fin is arranged at the upper end of the top plate, a lamp post pipe sleeve is fixedly welded to the middle of the reinforcing fin, a plurality of cooling fins are evenly distributed on the two sides of the reinforcing fin, a water retaining groove is formed in the lower end of the top plate along the edge, a heat-dissipating frame is installed on the inner side of the water retaining groove, a heat-dissipating plate is fixedly connected with the middle in the heat-dissipating frame, a heat conductive oil tube is installed on the back face of the heat-dissipating plate, an aluminum substrate is installed on the front face of the heat-dissipating plate, a plurality of LED light-emitting assemblies and a reflection cup are installed on the aluminum substrate, and an arc lampshade is installed at the lower end of the heat-dissipating frame. The LED road lamp is simple and reasonable in structure, much heat generated by the high-power LED light-emitting assemblies can be evenly and fast conducted to the heat dissipater through the heat conductive oil tube, the heat dissipation capacity is effectively improved, and the service life of the LED light-emitting assemblies is effectively prolonged; the waterproof effect is good, water is not prone to entering a lamp body, and therefore the lighting effect and normal use of the LED road lamp are ensured.