Crank arm type high-altitude lifter for traction, self-propelled, vehicle type, simple operation,convenient use, operation is big,especially to overcome some obstacles or in a lift, can be more work high above ground, can rotate 360 degrees to work; to prevent sudden blackouts, provided with emergency lowering device; prevent safety protection device for lifting platform overload safety device, to prevent the hydraulic pipeline brust.The elevator is widely used in highway, wharf, shopping malls, sports venues, residential property,factories and workshops in operation.