Wheel-leg compound module with quick- transforming ability

A wheel-leg compound module with quick- transforming ability includes a wheel rim, and a linkage rod assembly. The wheel rim has a first upper rim, a second upper rim, a first lower rim, and a second lower rim, which are connected to each other to form a circular wheel mode. The linkage rod assembly has a pair of upper driving nodes, a pair of lower driving nodes, which are pivotally connected to the first upper rim, and the second upper rim, respectively. By the driving of the pair of upper driving nodes, a top end of the first upper rim and a top end of the second upper rim can be close to each other or separated, so that an included angle between the first lower rim and the second lower rim is reduced with an outward extension. The wheel rim is transformed from a wheel mode to a leg mode.