Novel stepless speed change device

The invention relates to the field of speed changers, in particular to a novel stepless speed change device. The novel stepless speed change device mainly comprises an input member, a first clutch, a second clutch, a third clutch, a fourth clutch, a stepless speed change system and an output member. Power transmission of the novel stepless speed change device is completed by controlling the stepless speed change system and every two of the four clutches to work alternately. The novel stepless speed change device has the beneficial effects that the torque transmitted by the stepless speed changer, impact strength, the speed change range, efficiency and the like are greatly enlarged, and the novel stepless speed change device is simple in structure, low in cost and capable of being widely used.