Synthetic　phase　control　method　is　a　new　focusing　method　in　ultrasonic　guided　wave　inspection.　Different　from　the　time-reversal　focusing　method　that　requires　a　set　of　expensive　multi-channel　equipment　with　synchronization　module,　this　method　only　requires　single-channel　equipment,　which　is　widely　used　in　laboratories.　A　post-acquisition　signal　processing　method　based　on　synthetic　method　is　developed　to　achieve　the　phase　control　focusing　effect.　Both　finite　element　analysis　and　experiment　were　carried　out,　and　the　results　prove　the　effectiveness　of　the　synthetic　phase　control　method.　According　to　the　results,　the　normalized　amplitude　of　the　defect　echo　is　increased　by　2　times　using　the　synthetic　phase　control　method;　and　the　focusing　effect　similar　to　that　using　time-reversal　focusing　method　is　achieved.　At　the　same　time,　the　image　of　the　area　under　inspection　is　obtained　and　the　2D　localization　of　the　defects　is　realized.