The utility model belongs to the technical field of automobile lamps, and particularly relates to a fixing structure of a double-layer double-color
light guide plate, which comprises a first double-color
light guide plate, a second double-color
light guide plate and a third double-color light guide plate, the first double-color light guide plate comprises a vertically arranged first transparent plate and a horizontally arranged light absorption black plate, and the first transparent plate is connected with the light absorption black plate; the second double-color light guide plate and the first double-color light guide plate are arranged in parallel, the second double-color light guide plate comprises a second transparent plate which is vertically arranged and an
infrared-transmitting black plate which is horizontally arranged, and the second transparent plate is connected with the
infrared-transmitting black plate; the light-absorbing black plate extends in the direction close to the second transparent plate to be connected with the
infrared-transmitting black plate; the infrared-transmitting black plate is used for absorbing infrared light and
welding with the light-absorbing black plate after being fused; according to the utility model, the light-absorbing black plate and the infrared-transmitting black plate are arranged, and the infrared-transmitting black plate is welded with the light-absorbing black plate after being melted by infrared rays, so that the connection of the double-layer light guide plate is realized.