Method for producing a drive belt, comprising the following work steps: a) providing a mould core and an outer mould of a casting tool, wherein the mould core is provided to be inserted into the outer mould such that a cavity representing the shape of the drive belt to be produced is formed between the outer mould and the mould core sitting therein, and wherein the circumferential surface of the mould core assigned to the cavity or the inner circumferential surface of the outer mould assigned to the cavity is provided with a geometry to be represented on the drive belt which is formed by recesses or protrusions which are delimited by surfaces abutting one another which are formed into the circumferential surface of the mould core or the inner circumferential surface of the outer mould or formed on the circumferential surface of the mould core or the inner circumferential surface of the outer mould; b) placing a textile layer on the geometry to be represented on the drive belt; c) inserting the mould core into the outer mould so that the mould core and the outer mould define the cavity between them; d) optionally: arranging a tension member (Z, ZZ1, ZZ2, ZZ3) in the cavity; e) optionally: sealing the cavity at least in the region of the geometry to be represented on the drive belt with respect to the environment; f) applying the textile layer on the surfaces which delimit the geometry to be represented on the drive belt on the mould core or on the outer mould, wherein applying the textile layer on the geometry is supported by generating an underpressure in the region of the free spaces which are present between the textile layer and the geometry after work step b); g) introducing a castable elastomer base material into the cavity, wherein the base material penetrating into the cavity presses against the textile layer abutting on the geometry to be represented and the underpressure is maintained as before; h) optionally: pressing base material after completely filling the cavity with the base material to effect a pressure increase in the cavity; i) optionally: maintaining the pressure acting on the base material until the base material has become sufficiently hard; j) demoulding the belt winding obtained k) optionally: separating the drive belt from the belt winding. a) providing a mould core and an outer mould of a casting tool, wherein the mould core is provided to be inserted into the outer mould such that a cavity representing the shape of the drive belt to be produced is formed between the outer mould and the mould core sitting therein, and wherein the circumferential surface of the mould core assigned to the cavity or the inner circumferential surface of the outer mould assigned to the cavity is provided with a geometry to be represented on the drive belt which is formed by recesses or protrusions which are delimited by surfaces abutting one another which are formed into the circumferential surface of the mould core or the inner circumferential surface of the outer mould or formed on the circumferential surface of the mould core or the inner circumferential surface of the outer mould; b) placing a textile layer on the geometry to be represented on the drive belt; c) inserting the mould core into the outer mould so that the mould core and the outer mould define the cavity between them; d) optionally: arranging a tension member (Z, ZZ1, ZZ2, ZZ3) in the cavity; e) optionally: sealing the cavity at least in the region of the geometry to be represented on the drive belt with respect to the environment; f) applying the textile layer on the surfaces which delimit the geometry to be represented on the drive belt on the mould core or on the outer mould, wherein applying the textile layer on the geometry is supported by generating an underpressure in the region of the free spaces which are present between the textile layer and the geometry after work step b); g) introducing a castable elastomer base material into the cavity, wherein the base material penetrating into the cavity presses against the textile layer abutting on the geometry to be represented and the underpressure is maintained as before; h) optionally: pressing base material after completely filling the cavity with the base material to effect a pressure increase in the cavity; i) optionally: maintaining the pressure acting on the base material until the base material has become sufficiently hard; j) demoulding the belt winding obtained k) optionally: separating the drive belt from the belt winding.