Due to the characteristics of saving water and fertilizer，drip irrigation was widely used in greenhouse vegetable planting.Biochar can improve soil properties and plant growth due to its special properties.Understanding deeply on the interactive effects of drip irrigation types and biochar amendment on vegetable yield，quality and soil nitrogen transformational enzyme activity can provide the guidance for increasing use efficiencies of water and fertilizer，and reasonable irrigation and fertilization.In this study，four treatments were arranged in solar greenhouse:(1)surface drip irrigation(D)；(2)inserted subsurface drip irrigation(ID)；(3)surface drip irrigation+10 t·hm-2 biochar(D+B)；(4)inserted subsurface drip irrigation+10 t·hm-2 biochar(ID+B).The results showed that ID reduced soil NO^3--N content，but increased soil water content compared to D(P<0.05).Biochar increased soil NO^3--N content with inserted subsurface drip irrigation and soil water content with surface drip irrigation(P<0.05).ID increased green pepper yield by 11.70% compared to D(P<0.05).Biochar increased green pepper yield by 22.59% with surface drip irrigation(P<0.05).Compared to surface drip irrigation，inserted subsurface drip irrigation reduced green pepper soluble sugar content by 3.22% ～ 7.36%(P<0.05).Biochar reduced vitamin C content with inserted subsurface drip irrigation and total acid content with surface drip irrigation(P<0.05)，but increased soluble sugar contents in both drip irrigation patterns by 3.33% ～ 7.95%(P<0.05).Hence，biochar increased green pepper quality in greenhouse.In comparison with surface drip irrigation，inserted subsurface drip irrigation reduced soil nitrate reductase activities with or without biochar amendment(P<0.05)，which may be due to that inserted subsurface drip irrigation promoted the root growth，assimilated soil mineral nitrogen，and thus reduced denitrification substrate.Biochar increased soil urease and protease activities in both drip irrigation patterns(P<0.05)，but reduced soil nitrate reductase activity under inserted subsurface drip irrigation(P<0.05).From above，in can be seen that inserted subsurface drip irrigation can increase green pepper yield，and biochar can increase green pepper yield，and regulate soil nitrogen transformational enzyme activity in greenhouse.