Disclosed is a multi-wheel carrier with alternately mixed unidirectional wheels and omnidirectional wheels, used as a wheel of a ladder truck, a wheelchair for climbing stairs and an obstacle surmounting vehicle. The multi-wheel carrier structurally comprises: unidirectional wheels (1), omnidirectional wheels (2), a pin assembly (3), and a polygonal star-shaped carrier (4). The polygonal star-shaped carrier (4) may be a quadrilateral or hexagonal star-shaped carrier, the shape thereof being similar to a polygonal star. Since the omnidirectional wheels can be rotated in any horizontal direction, this multi-wheel carrier can guarantee that one wheel carrier has only one unidirectional wheel control direction. When walking horizontally, the polygonal star-shaped carrier (4) does not rotate, the unidirectional wheels (1) rotate in a front-rear direction, and the omnidirectional wheels (2) rotate in a front-rear and left-right direction, so as to move in the front-rear and left-right directions. When climbing stairs, as small wheels, the unidirectional wheels (1) and the omnidirectional wheels (2) rotate to approach a step, and then the rotation of the small wheels is blocked, the polygonal star-shaped carrier (4) rotates and surmounts the step. When going down stairs, initially two of the small wheels are landed, the small wheels rotate such that one small wheel is suspended, and then the polygonal star-shaped carrier (4) rotates until the suspended small wheel is landed.Linvention concerne un support à roues multiples ayant des roues unidirectionnelles et des roues omnidirectionnelles mixtes alternées, utilisées comme roue dune grande échelle, dun fauteuil roulant pour monter un escalier et dun véhicule de franchissement dobstacle. Le support à roues multiples comprend de façon structurelle : des roues unidirectionnelles (1), des roues omnidirectionnelles (2), un ensemble broche (3), et un support en forme détoile polygonale (4). Le support en forme détoile polygonale
