In　order　to　solve　the　problem　of　poor　output　waveform　quality　of　low-power　current　source,　a　PI+repetitive　control　algorithm　is　applied　to　control　the　single-phase　programmable　current　source　inverter.　Firstly,　an　inverter　system　model　is　built　to　design　the　PI　controller　and　repetitive　controller　with　parameters,　based　on　the　analysis　of　system　transfer　function　under　the　two　control　strategies.　Through　simulation　and　comparison,　it　is　concluded　that　the　output　waveform　of　composite　control　strategy　has　better　quality　and　higher　control　accuracy　than　PI　control.　Finally,　a　prototype　of　a　standard　programmable　current　source　with　a　power　of　25W　and　an　output　range　of　0~5A　was　built　and　experimental　results　prove　the　feasibility　of　the　theoretical　analysis.　©　2019,　Electrical　Technology　Press　Co.　Ltd.　All　right　reserved.