The invention discloses a profiled roll heat treatment method with the large requirement drop for a roll body and a roll neck, and belongs to the field of metal heat treatment. The method comprises the steps that thermal refining is carried out according to hardness requirements of the roller neck at first, and the roll body is subjected to differential temperature treatment, wherein a ledge is wrapped by a protection sleeve before the roll body is subjected to differential temperature treatment. Product performance indexes are ensured, and product quality stability is improved.