The invention relates to a heat dissipation lamp for an automobile. The heat dissipation lamp comprises a lamp holder, a lamp shell, a circuit board, an LED light emitting component, a heat dissipation ring, a reflective cover and a front lens. The lamp holder is fixedly connected with the lamp shell. The circuit board is fixedly arranged at the end, away from the lamp holder, of the lamp shell. The LED light emitting component is fixedly arranged at the end, away from the lamp shell, of the circuit board. The heat dissipation ring is arranged on the periphery of the circuit board in a sleeving mode and fixedly connected with the lamp shell. The reflective cover is arranged on the periphery of the LED light emitting component in a sleeving mode in a circular ring shape and fixedly connected with the heat dissipation ring. The front lens is fixedly connected to the end, away from the heat dissipation ring, of the reflective cover. The lamp shell is provided with an ultrasonic device. The ultrasonic device emits ultrasonic waves to the heat dissipation ring. The heat dissipation ring is provided with a fan. Compared with the prior art, the heat dissipation lamp has the advantages that light emitting performance is high, the light emitting effect is good, heat dissipation performance is high, the heat dissipation performance of the heat dissipation ring is avoided, and the service life of the device can be effectively prolonged.