The　structure　and　feature　of　a　novel　water　hydraulic　proportional　throttle　valve　were　introduced,　and　its　mathematical　model　of　dynamic　characteristics　was　established,　and　main　factors　affecting　dynamic　characteristics　were　determined　by　simulation　analysis　of　software　MATLAB　/　SIMULINK.　The　analysis　shows　that　input　signal　step　response　characteristics　of　the　novel　valve　are　related　to　step　amplitude　of　input　signal,　movement　damping　coefficient　of　spool-armature　component　and　stable　operating　pressure　of　the　load;　load　pressure　step　response　characteristics　of　the　novel　valve　are　associated　with　step　amplitude　of　load　pressure,　movement　damping　coefficient　of　spool-armature　component　and　stable　operating　pressure　of　the　load.　An　appropriate　increase　of　spool-armature　component　movement　damping　coefficient　is　beneficial　to　improve　input　signal　step　response　characteristics　and　load　pressure　step　response　characteristics　of　the　valve.　©　2010　IEEE.