In　this　study,　we　proposed　a　model　for　the　morphological　structure　of　electrospun　membranes;　it　was　different　from　the　random　distribution　of　fibers　in　a　nonwoven.　On　the　basis　of　our　observation　and　analysis　of　the　jet　path　by　a　high-speed　camera　and　the　electrospun　membranes　by　scanning　electron　microscopy,　we　proposed　the　base　circle/deposition　circle　model　of　electrospun　membranes.　The　base　circle　was　used　to　position　the　deposition　circles.　The　deposition　circles,　distributed　on　or　around　the　base　circle　at　a　specific　proportion,　represented　the　distribution　of　the　electrospun　fibers　on　the　collector.　The　pore　characteristics　and　fiber　distribution　were　compared　between　the　electrospun　membrane　and　simulated　membranes　with　different　spinning　times;　this　verified　that　they　had　similar　distribution　trends.　A　membrane　was　simulated　with　a　similar　magnification　ratio　to　the　actual　membrane.　This　further　verified　the　model.　This　model　could　be　used　for　the　homogeneity　simulation　of　an　electrospun　membrane　in　multinozzle　electrospinning,　and　this　may　be　helpful　for　predicting　electrospun　membranes　in　practical　applications.　(c)　2017　Wiley　Periodicals,　Inc.