The invention relates to the technical field of rubber, particularly a tire inner tube rubber composition which comprises the following components in parts by weight: 35-45 parts of natural rubber, 50-70 parts of outer tube regenerated rubber, 50-70 parts of brominated butyl regenerated rubber, 10-20 parts of carbon black N660, 10-20 parts of StronWiNTC, 1-2 parts of aromatic oil, 2-5 parts of stearic acid, 1-2 parts of anti-aging agent 4020, 1-2 parts of anti-aging agent RD, 1-2 parts of protective wax OK5194, 3-4 parts of rubber tackifying resin A-90, 5 parts of zinc oxide, 0.3-0.5 part of accelerator DM, 0.5-1.0 part of accelerator CZ and 2-3 parts of sulfur. The inner tube produced from the composition provided by the invention has the advantages of favorable gas retention performance, favorable aging resistance, high load carrying behavior, favorable processability and low cost.