Dielectric　metamaterials　have　been　proved　to　have　broad　applications　in　the　microwave　and　optical　frequency　bands.　However,　as　the　components　of　the　communication　system　shrink,　the　coupling　effects　caused　by　tight　arrangements　between　the　dielectric　structures　have　not　been　carefully　studied　enough　yet.　In　this　paper,　the　deep　coupling　effects　in　limited　space　between　the　adjacent　dielectric　metamaterials　cubes　are　investigated.　According　to　the　correlation　between　the　coupling　effect　and　the　incident　wave,　the　influence　of　coupling　effect　on　the　scattering　characteristics　of　the　structure　is　studied　from　three　aspects:　coupling　effect　parallel　to　the　wave　vector/electric　field/magnetic　field,　respectively.　Field　distributions　and　constitutive　parameters　are　also　demonstrated　to　illustrate　the　relationship　between　the　coupling　effects　and　scattering　coefficients.