The invention discloses a process for preparing activated carbon for air-raid shelters. The process comprises the following steps: finely selecting raw materials, preparing a first mixed liquid, preparing a second mixed liquid, preparing a third mixed liquid, soaking, calcining, preparing a fourth mixed liquid, performing secondary soaking, and performing secondary calcining. The process has the advantages that the produced activated carbon for air-raid shelters has the advantages of being high in strength, good in adsorption property, large in adsorption capacity, small in ash content, rapidin adsorption velocity, long in protection time, good in protection effect, and the like, has very good effects in industrial waste gas treatment, prevention of toxic and harmful gases, and the like,and particularly has excellent adsorption properties which are comparable by common granular carbon for benzene, hydrocyanic acid and chloroethane in waste gases; meanwhile, due to the product, defects of conventional coal columnar carbon are solved, the field of activated carbon is further widened, defects of the coal columnar carbon are further alleviated, and a relatively excellent product is provided for waste gas treatment, toxic and harmful gas prevention, and the like.