The invention discloses a method for preparing a multifunctional amorphous-state aluminum base alloy protection cladding coating. The method comprises the steps of supplying powder materials made of amorphous-state aluminum alloy and moving base materials. The method further comprises the following steps that a feeding device is selected through gravity; high-pressure gas is split and part of the high-pressure gas enters a powder filling machine to drive the powder; the rest part of the split gas passes through a heater and enters a sonic or ultrasonic spray gun after being combined with the part of the split gas which drives the powder. According to the method for preparing the multifunctional amorphous-state aluminum base alloy protection cladding coating, the prepared coating has the advantages of being compact in structure, good in combining force, high in strength, high in deposition rate of coating, high in speed, even in thickness, good in corrosion resisting property, convenient and quick to construct and the like; spaceflight, aviation, ordnance, naval ships, guided missiles and the like are made to have an important and special protection function for resisting damage to mechanics of machinery and environmental chemistry under various extreme environmental conditions.