The utility model relates to the technical field of infant physical training, in particular to a single-
plank bridge teaching aid suitable for infant physical training, which comprises a balance plate and auxiliary structures, the auxiliary structures are arranged on two sides of the balance plate, and each auxiliary structure can further comprise a supporting
assembly, a connecting piece, a first connecting rod, a spring and a second connecting rod. A coach moves a supporting rod outwards, the supporting rod drives a spring to stretch through a round block, after a supporting block is separated from a key groove in the corresponding position, the supporting rod is rotated, the supporting rod rotates along the round block to be perpendicular to a balance plate, the supporting rod is loosened, and the elastic force of the spring drives the supporting block to be matched with key grooves in other positions; and then the first connecting rod and the second connecting rod are pulled out from the interior of the supporting rod, the first connecting rod and the second connecting rod are fixed through the connecting piece, so that a transverse
handrail is formed to serve as an obstacle, the stability of the whole
handrail obstacle is improved through the integrated structure of the balance plate and the
handrail, and the situation that the handrail obstacle falls off and shakes is avoided.