The invention discloses high-temperature wear resistant laser cladding alloy powder. The alloy powder comprises the following components by atomic mole ratio: 12-20% of cobalt, 22-30% of iron, 29% of chromium, 8% of nickel, 7% of silicon, and 14% of boron; and the alloy powder selects materials of cobalt, chromium, iron and nickel pure metals with precision of above 99.7%, ferrosilicon with a silicon content of 77% and ferroboron with a boron content of 24%. A preparation process of the alloy powder is as follows: all the weighed components are mixed to put in a planet ball mill for ball milling under an argon protecting effect; and after the ball milling is finished, powder with a particle size of 200-300 meshes is screened out by a powder screen as finished powder. The alloy powder can be used for preparing an alloy coating layer containing an amorphous phase, and can realize excellent metallurgic bonding between the coating layer and a basal body; and as the alloy powder is used for preparing the alloy coating layer, the production cost of using rare earth metal to prepare the alloy coating layer can be largely reduced, the prepared alloy coating layer is higher in microscope hardness and high-temperature wear resistance, and is important in production meaning.