The utility model discloses a device for transmitting and receiving car driving information. The device comprises an infrared receiver and an infrared transmitter, wherein the infrared receiver is connected with a single chip microcomputer by a signal processing module; the infrared transmitter is connected with a single chip microcomputer by a signal modulation module; and the single chip microcomputer is also connected with a PC (Personal Computer) resetting circuit, a switching-state indicating circuit, an LED (Light-Emitting Diode) display and a buzzer. The device disclosed by the utility model has the advantages that the driving states of left turning, right turning and braking of a front car and overtaking of a rear car can be received; and the driving state can be displayed on the LED display, and is reminded by sound, so that the driving safety of the car is improved.