The invention discloses an accident fault-tolerant nuclear fuel cladding TiCrNiAlSi/ZrC coating and a preparation method. A laser micro-cladding technology is utilized, the TiCrNiAlSi/ZrC coating is prepared on a nuclear fuel cladding zirconium alloy pipe, and the aim of improving the oxidation resistance of the pipe is achieved. The coating is prepared from, by mass percent, 11%-16% of Ti, 20%-27% of Cr, 5%-8% of Al, 3%-6% of Si, 1%-3% of Ni and 40%-60% of ZrC. The power of a laser ranges from 60 W to 150 W, the spot diameter ranges from 60 micrometers to 150 micrometers, the laser scanning speed ranges from 400 mm/min to 700 mm/min, the overlap rate ranges from 15% to 30%, the powder feeding rate of a powder feeder ranges from 1.5 g/min to 3.5 g/min, the flow of protective argon ranges from 3 L/min to 6 L/min, and the included angle between powder beam flow and a laser beam ranges from 50 degrees to 75 degrees. A cladding layer good in metallurgical bonding with a matrix and free of air holes, cracks and other defects is obtained. The method has the beneficial effects that the laser beam mass is concentrated, the spot size is small, a formed melting pond is fine, the heat influence on the matrix is small, and the deformation of the matrix is small.