Based　on　the　study　of　Khatri-Rao　subspace　wideband　DOA　estimation　algorithm　(referred　as　KR),　a　Khatri-Rao　subspace　wideband　DOA　estimation　algorithm　in　view　of　propagator　method　(referred　as　KR-P)　is　proposed.　This　method　first　deletes　the　noise　and　invalid　information　in　the　covariance　matrix.　The　algorithm　used　is　the　orthogonal　projection　operator.　Simulation　results　show　that,　KR-P　algorithm　makes　the　calculation　process　easier.　When　the　number　of　array　elements　is　less　than　the　number　of　signal　sources.　wideband　DOA　estimation　can　still　be　performed.　And　when　the　SNR　is　low,　the　result　obtained　is　more　ideal　than　the　KR　algorithm.　©　2020　The　Institution　of　Engineering　and　Technology.