Novel power takeoff device of heavy-duty truck

The utility model discloses a novel power takeoff device of a heavy-duty truck. The novel power takeoff device includes a spline shaft, a slide sleeve is sleeved on the spline shaft and is integrated with a shifting fork, the shifting fork is fixedly connected with a shifting fork shaft, and a spring is sleeved on the shifting fork shaft; the spline shaft is connected with an input gear shaft; the input gear shaft is in transmission connected with an input gear which is engaged with an output gear; and the output gear is in transmission connection with an output flange. The power takeoff device of the heavy-duty truck serves as a rear-mounted power takeoff device, and power is taken off through a right middle shaft of a main box, conveyed to the input gear through the slide sleeve and output through an output gear shaft and the output flange.