In　this　paper,　a　new　multi-source　wideband　direction　of　arrival　(MSW-DOA)　estimation　method　is　proposed　for　the　signals　with　non-uniform　distribution　using　the　sub-array　of　uniform　linear　array.　Different　from　conventional　methods,　based　on　the　free　far-field　model,　the　proposed　method　mainly　makes　two　contributions.　One　is　that　the　sub-array　decomposition　is　adopted　to　improve　the　accuracy　of　MSW-DOA　estimation　by　minimizing　the　weighted　error,　and　the　other　one　is　that　the　frequency　focusing　procedure　is　optimized　according　to　the　presence　probability　of　sound　sources　for　reducing　the　influence　of　the　sub-bands　with　low　signal　to　noise　ratio　(SNR).　Simulation　results　show　that　the　proposed　method　can　effectively　improve　the　performance　of　wideband　DOA　estimation　in　the　case　of　multiple　sound　sources.　Copyright　©　2022　ISCA.