The invention discloses a method for producing multi-purpose deformed channel steel, which comprises the following steps of: 1, tempering; 2, heading; 3, pickling, phosphating and saponifying; 4, cold drawing and 5, straightening, wherein in the tempering step, a primary blank is subjected to heat treatment in a continuous heating furnace at the temperature of 750DEG C and a rotating speed of 500 revolutions/hour. The method has the advantages that: the process flow of tempering, heading, pickling, saponifying and cold drawing is strictly limited, the furnace temperature, heading length, the preparation of pickling and saponifying solution, and pickling and saponifying time, which are required to be noticed, are confined, and the multi-purpose deformed channel steel with high strength, uniform specification and high toughness is produced.