The invention belongs to the field of comprehensive industrial solid waste utilization, and particularly relates to a comprehensive steel slag utilization method. The comprehensive steel slag utilization method comprises the following steps that firstly, waste steel slag is crushed; secondly, the crushed steel slag is subjected to magnetic separation, steel slag with the iron content higher than 40% and slag soil with the iron content lower than 40% are selected; thirdly, slag soil with the iron content lower than 40% and an additive are evenly mixed according to the mass ratio of 80-90:10-20,and then die pressing forming is conducted; and fourthly, the steel slag with the iron content higher than 40% is used for smelting. According to the comprehensive steel slag utilization method, components, capable of being continuously smelted, in the steel slag are extracted according to crushing treatment and magnetic separation, and for parts which cannot be smelted, a simulated wood floor isprepared by adding other additives. According to the method, the steel slag utilization rate is greatly increased, the steel slag is sufficiently utilized, meanwhile, the added value of products is increased, and the important economic, social and environment protection significances are achieved.