Mechanical grinding(MG) was performed for Al-Cr and Al-V based alloys by using the crushed powder of arc-melted Al_94.5Cr₃Ce₁Co_1.5, Al₉₆V₄Fe₂, Al₉₁V₆Fe₃ and Al₈₈V₈Fe₄ alloys and the atomized Al₉₆V₄Fe₂ powder. The shape, structure and thermal stability were examined on powder prepared by MG. The phase of Al_94.5Cr₃Ce₁Co_1.5 powder change in the order of Al+Al₁₃Cr₂→Al+icosahedral(I)→Al+I+amorphous(Am)→Al+Am by MG. The nonequilibrium icosahedral or amorphous and Al phases were found to be formed for the MG Al-Cr and Al-V base alloys with Al-rich compositions of 88 to 95%. The formation of the MG-induced nonequilibrium phases were easier for atomized powder than for the crushed powder.