the inventive polyfunctional biocompatible hydrogel comprises 1 . 3 – 15 mass % of acrylamide , 0 . 004 – 0 . 975 mass % of cross - linking agents — n , n ′- methylen - bis - acrylamide , 0 . 004 – 5 . 1 mass % of n , n ′- ethylen - bis - acrylamide , 0 . 002 – 0 . 45 mass % of poviargol and water up to 100 mass %. said hydrogel is produced by sopolymerising acrylamide with the cross - linking agents in an aqueous medium in the presence of peroxide polymerisation initiator , the incubation of reaction mixture being carried out in two stages . the first stage is carried out at a temperature ranging from 20 to 90 ° c . during a time of 2 to 24 hours , the second stage being carried out at a temperature ranging from 107 to 130 ° c . during a time equal to or less than 2 hours .