The invention discloses a 
fibroin reinforcement technology for brittle silk, which comprises the following steps: A) a 
fibroin solution is prepared, a soft 
brush or an atomizing device is used to evenly 
brush or spray the 
fibroin solution on the brittle silk until the silk is evenly soaked by the fibroin solution, and then the silk is naturally dried; B) an 
ethylene glycol diglycidylether water solution is prepared, the soft 
brush or the atomizing device is used to evenly brush or spray the 
ethylene glycol diglycidylether 
aqueous solution on the brittle silk until the silk is evenly soaked by the 
ethylene glycol diglycidylether 
aqueous solution, and the silk is naturally dried; C) step A is repeated for n times, step B is repeated for m times, and the repeated steps can perform 
repeated treatment according to a mode of AB, ABAB,AABAAAB,AAAABAAAB,etc., wherein n is equal to 0, 1, 2, 3, 4, 5, and m is equal to 0, 1, 2, 3, 4, 5; D) the treated brittle silk is solidified; and E) the reinforced silk is obtained after the treatment. The reinforcement technology has the characteristics that the reinforcement technology has a simple method and simple and convenient operation, can greatly improve the strength of the brittle silk, does not affect the appearance of silk relics, can partially recover the silky luster of the relics, and has outstanding advantages in high 
temperature resistance and 
aging resistance and so on.