This paper aims to improvethe abrasive resistance of a plasma cladded FeCoCrNiAl high entropy alloy coating by annealing. The FeCoCrNiAl high entropy alloy coatings were prepared on a 45# steel substrate by plasma cladding technology. The cladded coatings were followed by annealing for 2 hours at 500 ℃, 800 ℃, and 1200 ℃, respectively. The microstructures and mechanical properties of both unannealed and annealed coatings were characterized through XRD, EDS, SEM, 3D morphometry, friction and wear tester, and Vikers hardness tester. It is proposed that the cladded FeCoCrNiAl coating before annealing consists of the BCC phase and plenty of unstable FCC phase. The single BCC phase was formed in the coating after annealing at 500 ℃, however, the BCC phase began to transform and a uniformly distributed FCC phase was precipitated when the annealing temperature reaches 800 ℃. The coatings annealed from these two temperatures both have a high level of hardness. However, the wear performance of the coating annealed from800 ℃ after friction and wear at 400 ℃ for 30 min is relatively poor, which is mainly attributed to the precipitation of the FCC phase. Furthermore, plenty of clavate and irregularly shaped Fe-Cr rich phases precipitate in the FeCoCrNiAl coating after annealing from 1200 ℃, resulting in a remarkable reduction of the hardness and more serious of wear of the coating. Further study suggests that the wear mechanism of FeCoCrNiAl coatings before annealing and after annealing from 500 ℃ is abrasive wear, the one annealed from 800 ℃ belongs to abrasive wear and adhesive wear, and the one annealed from 1200 ℃ has a combined mechanism of fatigue wear, abrasive wear and adhesive wear.