The utility model relates to the field of automotive technology, a audio frequency autoplay system is provided, be applied to the car, including a photoelectric sensor, main control chip and audio play module, a photoelectric sensor is connected with the main control chip electricity, and main control chip is connected with the audio play module electricity, a photoelectric sensor has a pluralityofly, distributes in outside front end, rear end, headlight department and the car side of car body for whether there is the object around the measuring automobile, if one arbitrary photoelectric sensor detects the object, then sends a level signal to main control chip, main control chip was used for when receiving a level signal first, the first pronunciation of control audio broadcast module broadcast. Compare with artifical introduction the among the prior art, the utility model discloses the autoplay pronunciation when bringing the good experience of client, have lightened salesman or teacher's working strength.