Abstract: According to the traditional technology of solving the ash-producing and yellowing of the chrome plating, in which the chrome-plating should be conducted after all the nickel-nickel-layers have been removed or the nickel layers polished mechanically, the labor pressure is high and the efficiency low. For this problem, the paper put forward a new craft to conduct chrome replating in an activated conditions of the passivity nickel layers adopting the chemical and electrical-chemical method. This craft enjoys low cost and has no pollution and is used in the replating for the precision spare parts.