The invention discloses an efficient erosion-resistant anti-gas-channeling cement paste system. The efficient erosion-resistant anti-gas-channeling cement paste system is characterized by being prepared from the following raw materials in parts by weight: 60-80 parts of erosion-resistant anti-gas-channeling cement, 2-4 parts of butadiene-styrene latex or polyimide latex or silicon dioxide/water mixed suspension, 0.2-2 parts of AMPS polymer fluid loss control agent, 0.05-0.2 part of polycarboxylic acid ether ester dispersing agent, 0.1-2 parts of chlorine-free aluminate complex accelerator, 0.1-0.5 part of organic phosphate retarder, 0.1-0.2 part of organic silicon defoaming agent and 20-30 parts of distilled water. According to the invention, the special functional materials are doped, so that the set cement is always kept in a proper alkaline environment, and a liquid-phase acidic medium is prevented from entering the set cement; the doped special functional materials ensure that the set cement has favorable mechanical properties; and the compactness of the set cement is increased, the toughness of the set cement is improved, and the bonding property and the sealing property between a cement sheath and a stratum are enhanced.