LED display module and preparation method thereof

The invention discloses an LED display module, which comprises a substrate, at least one LED chip arranged on the substrate and a shielding layer coated on the substrate, the LED chip comprises a chip main body, the chip main body comprises a first part and a second part formed below the first part, the first part is arranged on the substrate, and the second part is arranged below the first part. The side face, away from the second part, of the first part is a main light-emitting face, the first part and the second part are arranged in a T shape so that a blocking face can be formed between the first part and the second part, and the blocking face is used for blocking the shielding material of the shielding layer from climbing towards the side edge of the first part. According to the invention, the first part and the second part are arranged in the T shape, so that the blocking surface is formed between the first part and the second part, and when the part, in contact with the LED chip, of the shielding mater