The invention relates to a double-wheel self-balance robot. The double-wheel self-balance robot comprises the following components: (a) motor brackets (3) are arranged at two ends of an axle (5); andthe motor brackets are connected with speed reducing motors (2) and walking wheels (1); (b) spring brackets (18) are arranged at two ends of the axle, and two ends thereof are connected with spring dampers (4); a box body (17) is arranged under the axle; and four corners of the box body are connected with the spring dampers; and (c) a mechanical arm (16) is connected in front of the box body, anda mechanical tail achieving balancing and obstacle crossing effects is connected behind the box body; the mechanical tail comprises a tail wheel bracket (11) and a tail wheel (12); the middle part ofthe tail wheel bracket (11) is connected with a tail wheel steering engine (13); and a steering engine output shaft is fixed on a tail wheel U-shaped frame (10), and is connected behind the box body (17) through a driving unit formed by a driving steering engine (8) of an U-shaped frame (9). As the gravity center is lower than the plane of a wheel shaft, the balance is automatically approached, and a balance control sensor and other control elements are saved; and the double-wheel self-balance robot achieves the climbing assisting and obstacle crossing functions, and improves the pavement adaptability.