Distributed　electric　propulsion　(DEP)　uses　multiple　propellers　driven　by　motors　distributed　along　the　leading　edge　of　the　wing　to　produce　beneficial　aerodynamic　interactions.　However,　the　wing　will　be　in　the　sliding　flow　of　the　propeller　and　the　lift　and　drag　characteristics　of　the　wing　will　change　accordingly.　The　performance　of　the　propeller　will　also　be　affected　by　the　wing　in　its　rear.　In　this　paper,　combined　with　wind　tunnel　tests,　the　low　Reynolds　aerodynamic　properties　of　multiple　DEP　structures　are　numerically　simulated　by　solving　the　Reynolds　averaged　Navier-Stokes　(RANS)　equation　of　multiple　reference　frames　(MRF)　or　slip　grid　technology.　The　results　demonstrate　that　the　lift　and　drag　of　DEP　increase　in　all　cases,　with　the　magnitude　depending　on　the　angle　of　attack　(AOA)　and　the　relative　positions　of　propellers　and　wing.　When　the　AOA　is　less　than　16　degrees　(stall　AOA),　the　change　of　lift　is　not　affected　by　it.　By　contrast,　when　the　AOA　is　greater　than　16　degrees　the　L/D　(lift-to-drag　ratio)　of　the　DEP　system　increases　significantly.　This　is　because　the　propeller　slipstream　delays　laminar　flow　separation　and　increases　the　stall　AOA.　At　the　same　time,　the　inflow　and　the　downwash　effect,　which　is　generated　on　both　sides　of　the　rotating　shaft,　result　in　the　actual　AOA　of　the　wing　being　greater　than　the　free　flow　AOA　with　a　fluctuation　distribution　of　the　lift　coefficient　along　the　span.　Also,　for　the　propeller　in　the　DEP,　the　blocking　effect　of　the　wing　and　the　vortex　of　the　trailing　edge　of　the　wing　result　in　a　significant　increase　in　thrust.