Display substrate with multiple insulating layers and preparation method therefor, and display apparatus

A display substrate, comprising a plurality of circuit units, wherein at least one circuit unit comprises a pixel drive circuit, the pixel drive circuit comprises a storage capacitor and a plurality of oxide transistors, the storage capacitor at least comprises a first capacitor plate and a second capacitor plate, an orthographic projection of the first capacitor plate on a plane of the display substrate at least partially overlaps an orthographic projection of the second capacitor plate on the plane of the display substrate, and a capacitor insulating layer is arranged between the first capacitor plate and the second capacitor plate;

• and on a plane perpendicular to the display substrate, at least one circuit unit comprises a semiconductor layer and a first source-drain metal layer arranged on a base substrate in a direction away from the base substrate, at least one capacitor insulating layer is arranged on a side of the semiconductor layer close to the base substrate, or at least one capacitor insulating layer is arranged on a side of the first source-drain metal layer away from the base substrate,
• wherein on the plane perpendicular to the display substrate, at least one circuit unit at least comprises a shielding conductive layer, a first insulating layer, a first gate metal layer, a second insulating layer, the semiconductor layer, a third insulating layer, a second gate metal layer, a fourth insulating layer and the first source-drain metal layer arranged sequentially on the base substrate in the direction away from the base substrate, the first capacitor plate comprises a first plate arranged in the shielding conductive layer, the second capacitor plate comprises a second plate arranged in the first gate metal layer, an orthographic projection of the first plate on the base substrate at least partially overlaps an orthographic projection of the second plate on the base substrate, and the first plate and the second plate form a first storage capacitor.