The invention provides a vehicle-mounted combined flash buzzer relay which comprises a base 5 and a cover casing 6, wherein the cover casing 6 is fixedly arranged on the base 5; the base 5 is fixedly provided with a circuit board 4, a power input pin 7, a power output pin 8 and a ground pin 9; the circuit board 4 is provided with a control circuit and a current sampling circuit and is connected with a buzzer 1 and an electromagnetic relay 3; the current sampling circuit is connected with an overcurrent branch in series; the input end of the overcurrent branch is connected with the power input pin 7, and the output end of the overcurrent branch is connected with the input end of the electromagnetic relay 3; the input end of the control circuit is connected with the output end of the current sampling circuit; the output end of the control circuit is connected with the control end of the electromagnetic relay 3; the output end of the electromagnetic relay 3 is respectively connected with the buzzer 1 and the power output pin 8. The vehicle-mounted combined flash buzzer relay is capable of performing normal steering flash control, alarming flash control, lamp damage flash control of a vehicle, and further has a buzzing alarm control function during flash control, and is good in overall reliability and high in adaptive capacity to environment.