A securing method for a tilting jib crane (1; 2) to secure an angular position of a tilting jib (12; 22), said tilting jib (12; 22) being displaceable in lifting and in lowering by means of a tilting winch comprising a tilt motor driving a drum on which is wound a tilting rope coupled to the tilting jib (12; 22), said securing method being characterized in that said drum being secured in rotation with a locking platen provided with locking holes circumferentially distributed, said securing method implements a locking phase in which a lock is displaced: - from a release configuration in which said lock is disengaged from the locking platen to authorize the rotation of the drum and thus allow lifting/lowering of the tilting jib (12; 22), - to a locking configuration in which said lock is engaged inside one of the locking holes , after alignment, to block the rotation of the drum and thus secure the angular position of the tilting jib (12; 22); wherein the locking holes are all oblong arcuate shaped so that the lock is engaged with a circumferential clearance within a locking hole in the locking configuration; and in that it comprises the following steps: - measurement of a speed parameter (PM) representative of an angular speed of displacement of the tilting jib (12; 22), in lifting or in lowering; - first control of the tilt motor to displace the tilting jib (12; 22) in lifting or in lowering, with a limitation of the speed parameter (PM) to a first maximum speed value (V1) and a limitation of a motor torque of the tilt motor to a first torque limit value (C1), until a given angular position of the tilt jib (12; 22) is reached, in which the lock is aligned with one of the locking holes of the locking platen , said lock occupying the release configuration; - implementation of the locking phase by displacing the lock from the release configuration to the locking configuration; - second control of the tilt motor to displace the tilting jib (12; 22) in lowering, with a limitation of the speed parameter (PM) to a second maximum speed value (V2), which is lower than the first maximum speed value (V1), and a limitation of the motor torque of the tilt motor to a second torque limit value (C2), which is lower than the first torque limit value (C1), until that the speed parameter (PM) is zero for a predetermined time period to stop the tilt motor . - from a release configuration in which said lock is disengaged from the locking platen to authorize the rotation of the drum and thus allow lifting/lowering of the tilting jib (12; 22), - to a locking configuration in which said lock is engaged inside one of the locking holes , after alignment, to block the rotation of the drum and thus secure the angular position of the tilting jib (12; 22); - measurement of a speed parameter (PM) representative of an angular speed of displacement of the tilting jib (12; 22), in lifting or in lowering; - first control of the tilt motor to displace the tilting jib (12; 22) in lifting or in lowering, with a limitation of the speed parameter (PM) to a first maximum speed value (V1) and a limitation of a motor torque of the tilt motor to a first torque limit value (C1), until a given angular position of the tilt jib (12; 22) is reached, in which the lock is aligned with one of the locking holes of the locking platen , said lock occupying the release configuration; - implementation of the locking phase by displacing the lock from the release configuration to the locking configuration; - second control of the tilt motor to displace the tilting jib (12; 22) in lowering, with a limitation of the speed parameter (PM) to a second maximum speed value (V2), which is lower than the first maximum speed value (V1), and a limitation of the motor torque of the tilt motor to a second torque limit value (C2), which is lower than the first torque limit value (C1), until that the speed parameter (PM) is zero for a predetermined time period to stop the tilt motor . <EOS>