LED light mixing device

The utility model discloses an LED light mixing device and a manufacturing method thereof. The LED light mixing device comprises a substrate, at least two LED chips and a light mixing cover, wherein the LED chips and the light mixing cover are arranged on the substrate, and the light mixing cover is arranged outside the LED chips. The light mixing cover is in a boss shape and is provided with a side wall and a light outlet. A light mixing cavity defined by the side wall is communicated with the light outlet, and a micro reflection component is arranged on the inner surface of the side wall andused for conducting multiple times of total reflection on light emitted by the at least two LED chips so that the light can be emitted out of the light outlet after being evenly mixed in the light mixing cavity. According to the light mixing LED device and the manufacturing method thereof, light emitted by the LED chip can be fully mixed, the light mixing uniformity of the light mixing LED deviceis improved, and light sp