The AM60B magnesium alloy was subjected to friction stir processing(FSP) at different temperatures,and the friction and wear properties of AM60B magnesium alloy after FSP were studied,and the wear mechanism was analyzed.The results show that the FSP can refine the grains of the AM60B magnesium alloy in the stirring zone,recrystallize the grains in the heat affected zone and lengthen the grains in the heat affected zone.The grain size increases as the rotational speed increases.As the temperature increases,the wear rate of AM60B magnesium alloy increases and the friction coefficient increases.At 1 600 r/min and 200 mm/min,the wear rate of the sample at 25 ℃ is 70% of the base metal,and the wear rate at 200 ℃ is 95% of the base material.AM60B magnesium alloy is in abrasive wear and slight delamination wear at 25 ℃.The samples treated by FSP are mainly abrasive wear.At 100 ℃ and 200 ℃,AM60B magnesium and the as-FSP samples alloy are in severe delamination wear.At 200 ℃,as the FSP rotation speed increases,the degree of wear increases;as the FSP feed rate increases,the degree of wear decreases.This may be due to the fact that the FSP causes a change in the hardness of the magnesium alloy,which affects the change in wear resistance.