Advanced treatment and reuse method for iron and steel integrated wastewater

The invention provides an advanced treatment and reuse method for iron and steel integrated wastewater. The method consists of advanced treatment for wastewater and reuse treatment for wastewater. The advanced treatment for wastewater comprises that the iron and steel integrated wastewater which is pretreated by two-stage precipitation enters into a grille, and then is pumped into a hydrolysis-acidification pool by a lift pump; anaerobic effluent enters into an air floatation pool, enters into a secondary aeration biological filter, enters into a V-shaped filter, and flows into an intermediate pool after disinfection by a disinfection pool. The reuse treatment for wastewater comprises that the wastewater is pumped into a self-cleaning filter from the intermediate pool by the lift pump, and then enters into an ultrafiltration apparatus; effluent flows into a water collecting pool and is pumped in to a security filter by a reverse-osmosis lift pump, a reducing agent and a scale inhibitor are added, and finally the wastewater is pumped into a reverse-osmosis apparatus by a high-pressure pump, the effluent flowing into a reuse pool. The advanced treatment and reuse method can save an abundance of fresh water resources, reduces the production cost of an enterprise, reduces environmental pollutions, and is helpful for the sustainable development of the human society.