U-shaped disk interface indicating lamp of vehicle-mounted compact disc (CD) player

The utility model relates to a U-shaped disk interface indicating lamp of a vehicle-mounted compact disc (CD) player. The U-shaped disk interface indicating lamp of the vehicle-mounted compact disc (CD) player comprises a light guide body with a U-shaped groove at one end, the inner wall of the U-shaped groove is a U-shaped out-light surface, an in-light surface is arranged at the other end of the light guide body, a light source is arranged at the position of the in-light surface, a reflective film is coated on other surfaces of the light guide body except the in-light surface and the U-shaped out-light surface, a positioning hole is arranged on the light guide body, and the light guide body is further provided with a light dimming hole. The light dimming hole is arranged on the light guide body, light which radiates to the middle originally is diffused to two sides through refraction and reflection of light at the position of an interface of the light guide body at the light dimming hole and the air, light