The invention discloses a high-temperature-resistant and wear-resistant hard alloy with a NiAl alloying bonding phase. WC and/TiC is used as a hard phase, NiAl alloying Co and/Fe is used as a bonding phase, and the volume ratio of the hard phase to the bonding phase is equal to 10-40%. The preparation method comprises the following steps of: uniformly mixing 0.03-21.04wt% of nickel powder and aluminum powder with carbide powder based on the component proportion of Ni-50at.%Al; placing the mixture in a graphite container to spread out, heating the mixture to 660-1300 DEG C at a non-oxidative atmosphere, preserving heat, and then naturally cooling to obtain a mixture of a carbide and NiAl; grinding, crushing and screening to obtain mixed powder; carrying out deoxidation pretreatment at a hydrogen atmosphere of 400+/-50 DEG C; carrying out wet grinding on 45.77-96.34wt% of mixed powder and the balance of Co and/Fe powder; carrying out spray-drying on the mixed material subjected to wet grinding and pressing; and sintering a compaction in a liquid phase at low pressure at the temperature of 1350-1550 DEG C to obtain the high-temperature-resistant and wear-resistant hard alloy.