Low　tracking　accuracy　of　trackers,　structure　vibration　by　winds,　and　lens　deformation　by　temperature　lead　to　non-vertical　incident　irradiation　of　Fresnel　lens,　which　necessitates　a　secondary　concentrator　in　actual　engineering　application　of　concentrating　photovoltaic　module.　In　this　study,　a　secondary　focusable　and　uniform　convergence　microprism　is　added　between　Fresnel　lens　and　solar　cell　to　improve　concentrating　efficiency　and　focal　spot　energy　uniformity.　The　3D　model　of　microprism　is　established　by　SolidWorks,　and　important　parameters　are　optimized　using　Zemax.　Results　showed　that　combination　of　Fresnel　lens　and　focusable　and　uniform　convergence　microprism　achieves　the　highest　power　when　upper　spherical　diameter　of　secondary　microprism　measures　18　mm,　included　angle　in　opposite　side　facets　equals　116°,　spherical　height　removed　from　the　top　is　0.1　mm,　and　side　length　of　bottom　reaches　2.15　mm.　The　highest　power　of　solar　cell　surface　can　reach　2.4932　W,　representing　a　32.9%　improvement;　focal　spot　energy　uniformity　is　0.71;　and　module　height　with　secondary　microprism　measures　88　mm,　which　reduces　by　5.5　mm　without　secondary　microprism.　Experimental　results　show　that　concentrating　static　test　generation　efficiency　of　a　400-times　concentrating　module　system　reaches　34.9%,　acceptance　angle　measures　±1.18°,　efficiency　loss　of　module　is　less　than　1.23%　when　temperature　changes　from　-20°C　to　20°C　and　from　20°C　to　50°C,　and　400-times　module　maximum　output　power　totals　142.3　W.　©　The　Authors,　published　by　EDP　Sciences.　This　is　an　open　access　article　distributed　under　the　terms　of　the　Creative　Commons　Attribution　License　4.0　(http://creativecommons.org/licenses/by/4.0/)