The invention belongs to the technical field of skiing equipment, and particularly relates to an ice-snow sports auxiliary device. The ice-snow sports auxiliary device comprises a main framework, a fixing device, a main supporting leg, an auxiliary leg and skiing boards, wherein the main framework is of a U-shaped structure; the fixing device is arranged at the inner side of the U-shaped structure; the main supporting leg is arranged on the left end of the main framework; the lower end of the main supporting leg is connected with one skiing board; the right end of the main framework is connected with the auxiliary leg through spherical hinging; the lower end of the auxiliary leg is connected with one skiing board. A human body can be fixed in the main framework and can be supported throughthe main supporting leg, a disabled leg can be replaced by the auxiliary leg, and pedaling motion of skiing can be completed by the auxiliary leg, so that normal skiing motion can be simulated, and normal skiing experience can be experienced by a skier who is disabled in one leg.