A flexible display cover plate, a preparation method thereof and a foldable display apparatus are provided. The flexible display cover plate includes a flexible substrate, wherein the flexible substrate includes a plurality of non-bendable portions and at least one bendable portion, the bendable portion is connected between adjacent non-bendable portions, a resilient functional layer for resilience of the bendable portion is arranged on the flexible substrate, and the resilient functional layer covers at least part of the bendable portion.