Luminous element and preparation method thereof

The invention discloses a luminous element and a preparation method thereof. The luminous element comprises a base plate, a luminous chip, a tubular structure and a fluorescence-converting layer. The tubular structure is formed on the surface of the base plate; the luminous chip is arranged on the surface of the base plate and is encircled by the tubular structure; the fluorescence-converting layer is arranged in the tubular structure and covers the luminous chip. The ratio of the largest vertical thickness and the largest horizontal thickness of the fluorescence-converting layer at the luminous chip part is 0.1-10. In the invention, the distance that light rays can penetrate through the fluorescence-converting layer after the luminous chip emits the light rays is controlled by the tubular structure, thus solving the problem of uneven color temperature of the light rays caused by the fluorescent powder spread coating encapsulation technology in the prior art.