FIELD: chemistry.SUBSTANCE: claimed invention relates to biodegradable water-insoluble polyethyleneglycol-based hydrogels. The claimed invention also deals with conjugates of such biodegradable hydrogels with affinity ligands or chelating groups or ion-exchange groups, bound with carriers of prodrugs, in which a biodegradable hydrogel in accordance with the claimed invention is the carrier, and their pharmaceutical compositions, as well as to their application as a drug. Described is a biodegradable water-insoluble poly(ethyleneglycol)-based hydrogel, containing fragments of the main chain, connected by hydrolytically degradable bonds, with fragments of the main chain being characterised by the molecular weight in the range from 1 kDa to 20 kDa and having the structure C*-(A-Hyp)x, where C* represents a branching core, A represents a polymer poly(ethyleneglycol)-based chain, Hyp represents a super-branched dendrite fragment, x represents an integer number from 3 to 15； and where the superbranched dendrite fragment additionally contains reactionable functional groups and connecting functional groups, with the fragments of the main chain being connected together by means of cross-linking fragments, and each cross-linking fragment has at least two hydrolytically degradable bonds at the end. A conjugate and a bound with the carrier prodrug, containing the said biodegradable hydrogel, and the application of the prodrug in a medication are also described. Also described are: a method of obtaining the said hydrogel, which includes a stage (a) reacting of a main chain reagent, and the hydrogel, obtained by the claimed method, in the form of a coating mesh, a stent or a microparticle, obtained by crashing by mechanical methods, such as mixing, breaking, cutting pressing or milling, and sieving in case of necessity.EFFECT: disclosed are the methods of obtaining the prodrug, the method of obtaining the prodrug, injected through the needle, and the prodrug, obtained by the clai
