The invention discloses a high-temperature-resistant high-bonding-strength low infrared emissivity composite coating which sequentially comprises a NiCrAlY plasma spraying layer, a ZrO2 plasma spraying layer and ZrO2-Al2O3-SiO2 system containing AgPd alloy glass coating from inside to outside. The surface roughness of a metal alloy material coated with the coating is lower than 2.0 micrometers, the bonding strength of the metal alloy material exceeds 10MPa, the tolerable temperature of the coating is higher than 1000 DEG C, and the average infrared emissivity of the coating in a specified band is less than 0.3. A preparation method of the metal alloy material includes the steps: firstly, performing sand blasting for a base; secondly, sequentially spraying the NiCrAlY layer and the ZrO2 layer on the base by a plasma spraying process; finally, uniformly brushing or printing coatings on the ZrO2 layer, and drying and sintering the coatings to obtain the finished metal alloy material. The metal alloy material can be used in a high-temperature environment, infrared radiation of a high-temperature component is effectively reduced, and the metal alloy material is stable in performance and low in cost.