The invention discloses an anti-drag and anticorrosion coating for an inner wall of a natural gas/condensed liquid pipeline and a preparation method thereof. The coating comprises an ingredient A and an ingredient B according to a mass ratio of (2-4):1, wherein the ingredient A comprises the following ingredients in parts by mass: 5-30 parts of liquid organic silicon resin, 30-55 parts of liquid epoxy resin, 1-15 parts of flexibilizer, 0.1-2 parts of leveling agent, 0.1-1.5 parts of defoaming agent, 0.05-1.5 parts of dispersing agent, 0.1-2 parts of coupling agent, 0.0-2 parts of anti-settling agent, 0-15 parts of pigment and 10-60 parts of filler; the ingredient B comprises the following ingredients in parts by mass: 40-70 parts of modified polyamine curing agent, 5-35 parts of phenolic resin curing agent, 0.5-2.5 parts of dispersant, 0.5-2.5 parts of anti-settling agent and 15-50 parts of filler; and the ingredient A and the ingredient B in the coating are packaged in a binary manner. The coating has the advantages of good resistance to high pressure natural gas or gas-liquid decompression and bubbling, shear resistance, high bonding strength, good wear resistance, resistance to corrosion of natural gas condensed liquid, smoothness and compactness of the coating, no solvent, quick drying and the like below 50 DEG C, and is suitable for mining requirements under anti-drag, anticorrosion and wear-resistant environments.