Display module and assembly method therefor, and display apparatus

An assembly method for a display module, comprising:

• cutting a base material of an isolation film to obtain at least one initial isolation film having a shape with an initial target size;
• attaching the at least one initial isolation film to a surface of a base material of a first optical adhesive layer at a target position;
• cutting the base material of the first optical adhesive layer attached with the at least one initial isolation film to obtain a first optical adhesive layer having a shape with a target size, and to obtain at least one isolation film having another shape of another target size;
• and
• using the first optical adhesive layer attached with the at least one isolation film to make a display panel adhere to a touch panel, wherein
• the display panel has a display region and a peripheral region, and includes at least one alignment mark in the peripheral region;
• the touch panel includes a plurality of peripheral signal lines;
• an orthographic projection of the plurality of peripheral signal lines on a plane where the display panel is located at least partially overlaps with an orthographic projection of the at least one alignment mark on the plane where the display panel is located;
• and
• an orthographic projection of each isolation film on the plane where the display panel is located covers an alignment mark.