Abstract: Horizontal wells in Dagang Oilfield are mainly completed by sand control screen. In the actual production process, although the overall development effect looks good, but there are still problems such as sand screen leakage and block, sand-striking and sand-burying which affect the normal production seriously. So we have carried out evaluation study on sand control screens for horizontal well. This paper confirmed the adaptability of different screens in various reservoirs by experiments and then proposed some matters needing attention. In designing sand control screens the precision should not too close to grain size median and in adopting classified sand control screen completion liquid producing strength should be controlled. This technology has active guidance meaning and applied value for using sand control screens in horizontal wells in sand producing formation.