This work presents the experimental characterization of open-cell spherical cell porous aluminum alloy-polyurethane composites (SCPAA/PU composites) under a single full unloading/reloading cycle and seven complete repeated cycles, respectively. Three batches of SCPAA/PU composites are prepared for each loading pattern. The present paper mainly focuses on the three characteristic parameters, including unloading modulus, plastic strain and stress degradation ratio. The test results show that cyclic stress-strain curves of the composites under the two loading patterns exhibit the post-peak strain softening. Moreover, unloading modulus of the composites increases firstly and then reduces rapidly. The effect of the repeated cycles on the unloading modulus is closely associated with the applied strain. Initially, plastic strain ascends linearly with the increment of the applied strain, whereas, after a threshold strain, the growth rate slows down gradually. And the plastic strain is independent of the repeated cycles. Stress degradation ratio remains almost stable within a threshold strain and then reduces swiftly. The effect of the repeated cycles on the stress degradation ratio is also observed to be related to the applied strain.