The invention discloses a
composite structure wheel heightening block. The
composite structure wheel heightening block comprises a heightening block body, a retaining rotating shaft and a first retaining structure. The heightening block body is provided with an inclined part and a heightening part, the inclined part and the heightening part are sequentially connected in the driving-in direction of a wheel, and the inclined part is used for allowing the wheel to
climb or go down a slope; the retaining rotating shaft is hinged to the heightening part and located on the top of the heightening part. The first retaining structure comprises a first one-way rotating intercepting rod and a first
ratchet wheel, one of the first one-way rotating intercepting rod and the first
ratchet wheel is arranged on the heightening block body, and the other one of the first one-way rotating intercepting rod and the first
ratchet wheel is arranged on the retaining rotating shaft; the first one-way rotation intercepting rod abuts against the first ratchet wheel so as to prevent the retaining rotating shaft from generating rotational
inertia advancing in the driving-in direction. The wheel can be effectively prevented from accidentally sliding down, and the safety is good.