The reservoir collapse， screen blocked and gravel packing difficult to pack densely were the main problems in open hole of horizontal well. To solve these problems， a polyurethane-expandable material that had shape memory function was developed. The shape memory， permeability， compression resistance and acid and alkali resistance of polyurethane demo were studied， and the throughput capacity and sand control accuracy of polyurethane sieve tube sample were investigated. The results showed that the shape memory function of polyurethane material was good. The shape recovery and expansion were affected by temperature. The higher temperature， the higher shape recovery rate and the faster shape recovery were. The shape recovery rate was above 99% and polyurethane material returned to the initial state when the temperature reached 90℃. The expansion rate of polyurethane material increased with increasing temperature， which maximum value was up to 400% . The permeability of polyurethane compression material after returned to the initial state was 180 × 10^-3—200 × 10^-3 μm²， and the compressive strength was 1—3 MPa. The polyurethane material had good acid and alkali resistance. Compared with the resin screen， the polyurethane sieve tube sample had poor throughput capacity and high sand control accuracy.