The invention discloses a military camouflage rubber base material and a preparation method thereof. The military camouflage rubber base material comprises a main rubber material and a camouflage rubber material, the main rubber material is prepared from, by weight, 30-50 parts of natural rubber, 10-20 parts of butadiene styrene rubber, 40-50 parts of butadiene rubber, 50-60 parts of white carbonblack, 1-3 parts of sulphur, 4.5-7 parts of an active agent, 0.8-3 parts of an accelerant, 3.1-8.5 parts of an antiager, 0.5-1 part of a softener, 4-5 parts of a modifier and 0.5-1 part of army greenglue; the camouflage rubber material is prepared from natural rubber, butadiene styrene rubber, butadiene rubber, white carbon black, sulphur, an active agent, an accelerant, an antiager, a softener,a modifier and camouflage color glue. The preparation method is simple, and the prepared military camouflage rubber base material has the advantages of being wear-proof, high in strength and good in wearing comfort.