Functional footwear provided with unstable structures

The invention discloses functional footwear provided with unstable structures. The footwear includes a left shoe (1) and a right shoe, wherein convex blocks (2) are arranged on the lower surfaces of sole big toe regions (1.1.2) of soles of the left shoe (1) and the right shoe, and the convex blocks (2) are made from an elastic material; and force-bearing points of the sole big toe regions (1.1.2) are located in a same plumb line with the gravity centers of the convex blocks (2). The functional footwear is conducive to recovery of a road gripping function of foot toe regions of a human body.