The invention relates to the field of display devices, and discloses a flexible display screen and a flexible display device, wherein the flexible display screen includes: a flexible substrate including a functional area in which functional elements are arranged, and a peripheral area around the functional area, wherein the flexible substrate includes at least one bent section; and a support structure arranged in the peripheral area of the flexible substrate, wherein the support structure traverses the bent section, and can be bent or expanded along with the bent section.