A hoisting machinery, comprising: a steering wheel; wheels; a pitman arm; an active steering device, arranged between the steering wheel and the pitman arm, for adjusting a steering ratio of the steering wheel to the pitman arm according to a driving cycle of the hoisting machinery; a hydraulic power steering system; and a hydraulic power steering gear, arranged between the steering wheel and the pitman arm, for controlling the hydraulic power steering system to drive the steering of the wheels; wherein the active steering device comprises a differential gear train, the differential gear train comprises an input shaft to an output shaft, the active steering device is configured to adjust a transmission ratio of the input shaft to the output shaft so as to change a steering ratio of the steering wheel to the hydraulic power steering gear; wherein the active steering device further comprises a motor, the differential gear train comprises a planet wheel, a tie bar, a first gear and a second gear, the motor is connected with the planet wheel in a driving manner through the tie bar, the first gear is engaged with the planet wheel, characterized in that the first gear is connected with the steering wheel through the input shaft, and the second gear is engaged with the planet wheel and is connected with the hydraulic power steering gear through the output shaft; the active steering device is arranged between the hydraulic power steering gear and the pitman arm, the active steering device is configured to change a transmission ratio of an output of the hydraulic power steering gear to an output of the pitman arm. a steering wheel; wheels; a pitman arm; an active steering device, arranged between the steering wheel and the pitman arm, for adjusting a steering ratio of the steering wheel to the pitman arm according to a driving cycle of the hoisting machinery; a hydraulic power steering system; and a hydraulic power steering gear, arranged between the steering wheel and the pitman arm, for controlling the hydraulic power steering system to drive the steering of the wheels; wherein the active steering device comprises a differential gear train, the differential gear train comprises an input shaft to an output shaft, the active steering device is configured to adjust a transmission ratio of the input shaft to the output shaft so as to change a steering ratio of the steering wheel to the hydraulic power steering gear; wherein the active steering device further comprises a motor, the differential gear train comprises a planet wheel, a tie bar, a first gear and a second gear, the motor is connected with the planet wheel in a driving manner through the tie bar, the first gear is engaged with the planet wheel, characterized in that the first gear is connected with the steering wheel through the input shaft, and the second gear is engaged with the planet wheel and is connected with the hydraulic power steering gear through the output shaft; the active steering device is arranged between the hydraulic power steering gear and the pitman arm, the active steering device is configured to change a transmission ratio of an output of the hydraulic power steering gear to an output of the pitman arm.