The invention provides a manufacturing method for high-strength calfskin for a special purpose. Calf wet blue which is evenly shaved through a conventional process is used as a raw material, the raw material is weighed, returned to water, degreased, retanned, neutralized, filled with grease and top-dyed, and then the raw material is sorted and coated according to the conventional process. In the retanning working procedure, tannin extract is used and combined with phthalidyl/peptide bonds on a polypeptide chain of skin collagen through hydrogen bonds, and therefore raw hide is changed into leather; fatty aldehyde is added in the retanning working procedure, carbonyl in the fatty aldehyde reacts with amidogen in skin collagen fiber, the skin collagen fiber is further fixed, and the defects existing in tannin extract tanning are overcome; and non-chrome retanning is performed, the fatty aldehyde is used for replacing a chrome tanning agent, and therefore chrome pollution is greatly reduced. The fatty aldehyde is added in the greasing working procedure, so that the fullness and the softness of the leather are improved, the alkali resistance and the laundering durability of the leather are improved, and the shrinkage temperature of the leather is increased. The tensile strength of the calfskin manufactured through the method is 19 N/mm<2> and the tearing strength is increased to 72 N/mm and the tensile strength and the tearing strength of the calfskin are increased by 26.7% and 10.77% compared with those of calfskin produced through an existing process.