The invention discloses a hypotonic and ultra-hypotonic three-dimensional sand-packing model, which is applied to an indoor experiment research in oil field development. The hypotonic and ultra-hypotonic three-dimensional sand-packing model comprises the following components in percentage by weight: 10-20% of quartz sand with the granularity of 0.5-1mm, 13-15% of quartz sand with the granularity of 1-2mm, 5-12% of quartz sand with the granularity of 2-4mm, 6-8% of quartz sand with the granularity of 4-8mm, 1-2% of quartz sand with the granularity of 8-16mm, 15-18% of graphite powder, 3-10% of pulverized coal with the granularity of 20-50mum, 5-12% of mica powder with the graphite of 500meshes and 10-20% of mica powder with the graphite of 800meshes. The above components are burdened, moulded by layers and pressurized to obtain the hypotonic and ultra-hypotonic three-dimensional sand-packing model. The hypotonic and ultra-hypotonic three-dimensional sand-packing model disclosed by the invention has the effects that the problem that a hyposmosis oil deposit laboratory cannot manufacture a three-dimensional sand-packing model is solved, and the three-dimensional sand-packing model is used for the indoor experiment research of the hyposmosis oil deposit, and guides in-field production.