The invention discloses an adhesive removing agent as well as preparation and using methods thereof. The adhesive removing agent comprises turpentine oil, rosin water, 120# gasoline, kerosene, benzene, methylbenzene, dimethylbenzene, acetone, urotropine, oxalic acid, ethyl acetate, butyl acetate and ethyl alcohol. The turpentine oil, the rosin water, the 120# gasoline and the kerosene are evenly mixed firstly, the benzene, the methylbenzene and the dimethylbenzene are sequentially added, the mixture is evenly mixed, the urotropine is added after complete dissolution, then the oxalic acid, the ethyl acetate and the butyl acetate are added sequentially, the acetone and the ethyl alcohol are added finally, and the mixture is evenly mixed. A plastic layer on the surface of an object is removed by hand, the adhesive removing agent is sprayed on the surface of the adhesive object and soaks the object, the adhesive is wiped with rag, and the object is washed with clear water. The adhesive removing agent can effectively remove the adhesive object and thoroughly remove adhesive objects such as signboards, adhesive tapes and the like, the using method is simple, heating is not required, and the adhesive removing agent can be used through brushing or spraying at the normal temperature and is short in washing time, good in removal effect, environment-friendly and efficient.