Semiconductor light-emitting element, preparation method thereof and display equipment

The invention provides a semiconductor light-emitting element, a preparation method thereof and display equipment. The semiconductor light-emitting element comprises a first semiconductor layer, an electron hole composite layer, a second semiconductor layer and a substrate which are sequentially stacked, the substrate is conductive and comprises a body and an extension part, and the extension part is arranged on one side of the body in a protruding mode towards the peripheral side of the body and exposed out of the first semiconductor layer; the insulating layer comprises a first sub-layer and a second sub-layer which are connected in a bending manner, the first sub-layer is arranged on the top surface, the second sub-layer is arranged on one side, close to the extension part, of the second semiconductor layer, the electron-hole composite layer and the first semiconductor layer, and the second sub-layer abuts against the extension part; the first electrode is partially arranged on the surface, deviating from