The invention discloses a moisturizing type oil sand gas floatation agent. The moisturizing type oil sand gas floatation agent comprises an asphalt emulsifier, methyl alcohol, a foaming agent, a water purifying agent and water; the asphalt emulsifier is composed of cetyltrimethylammonium chloride, the foaming agent is composed of N,N-dimethyldodecylamine-N-oxide sol, the water purifying agent is composed of aluminium polychlorid, the mass percent of the asphalt emulsifier in emulsified asphalt composed of the asphalt emulsifier and the methyl alcohol ranges from 45% to 55%, the mass percent of the water purifying agent in water purifying liquid composed of the water purifying agent and the water ranges from 35% to 45%, the mass percent of the asphalt emulsifier in the moisturizing type oil sand gas floatation agent ranges from 5% to 8%, and the mass percent of the foaming agent in the moisturizing type oil sand gas floatation agent ranges from 3% to 5%. Through a large amount of repeated verification, the agent can be applied to moisturizing type oil sand flotation, the technical aim of peeling asphalt oil from moisturizing type oil sand through the thermochemistry washing-floating process is achieved, the oil sand separation effect is obviously improved, and the peeled asphaltic oil has good condensation, coalescence and buoyancy lift effects.