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 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 to a first maximum speed value and a limitation of a motor torque of the tilt motor to a first torque limit value, 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 to a second maximum speed value, which is lower than the first maximum speed value, and a limitation of the motor torque of the tilt motor to a second torque limit value, which is lower than the first torque limit value, until that the speed parameter 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 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 to a first maximum speed value and a limitation of a motor torque of the tilt motor to a first torque limit value, 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 to a second maximum speed value, which is lower than the first maximum speed value, and a limitation of the motor torque of the tilt motor to a second torque limit value, which is lower than the first torque limit value, until that the speed parameter is zero for a predetermined time period to stop the tilt motor.