The invention relates to a concrete repairing material suitable for an ocean environment and a preparation method thereof. The repairing material is prepared from the following components in parts bymass: 100 to 230 parts of portland cement, 20 to 47 parts of aluminate cement, 10 to 25 parts of dihydrate gypsum, 0 to 110 parts of mineral powder, 3.0 to 4.5 parts of water reducer, 0 to 2 parts ofearly strength agent, 0.01 to 0.02 part of air entraining agent, 5 to 20 parts of polyester fiber, 0.10 to 0.15 part of antifoaming agent and 300 to 500 parts of quartz. ,According to the invention, the portland cement is complexed with the aluminate cement, so that the early strength and later strength are ensured, resistance of mortar to chlorine salt, sulfate and magnesium salt in the ocean environment is enhanced. The concrete repairing material is suitable for ocean-eroded concrete repairing engineering, is large in market space, and is high in practicability.