Effects　of　drip　irrigation　frequency　on　soil　water-heat　distribution　and　root　distribution　and　yield　of　spring　maize　were　analyzed　on　the　basis　of　the　lower　limits　of　optimum　soil　moisture　and　the　same　irrigation　quota　in　Beijing　District,　where　irrigation　model　was　combined　field　irrigation　of　spring　maize　with　precipitation.　The　results　show　that,　under　each　drip　irrigation　treatment　before　the　tasselling　stage　of　spring　maize,　the　fluctuation　of　average　soil　water　content　and　soil　matric　potential　at　different　soil　depths　are　comparative　low　under　high　frequency　drip　irrigation　treatment　(HDI),　and　the　HDI　can　hold　stable　soil　water　content.　The　drip　irrigation　can　obviously　delay　the　effect　of　air　temperature　on　the　soil　temperature,　which　was　influenced　by　irrigation　process,　soil　water　content　and　crop　growth　stages.　In　addition,　the　irrigation　frequency　affects　the　spring　maize　root　distribution　in　the　soil,　and　the　HDI　improves　the　probability　of　root　distribution　in　upper　soil　(0-40　cm).　The　yield　difference　of　spring　maize　for　irrigation　frequency　treatments　is　not　significant　under　the　typical　field　irrigation　model　combined　irrigation　with　precipitation.　Therefore,　the　low　frequency　drip　irrigation　method　should　be　recommended　for　spring　maize　in　North　China　under　such　irrigation　model.