A single-powered multi-CVT differential system with a stabilizing device, comprising: a single power source; a first continuous variable transmission and a second continuous variable transmission operable to automatically change a respective speed ratio according to a load state on a respective first wheel set and second wheel set, each of said continuous variable transmission having a first end connected to receive power from the single power source; a first stabilizing device having dual-end shafts, each end being connected to a respective second end of the first continuous variable transmission and the second continuous variable transmission or between driven load sides, said first stabilizing device having the functions of setting coupling torque and sliding damping formed by fluid viscosity effect, fluid damping effect, mechanical friction effect, or electromagnetic eddy current effect or power generation anti-torque effect, if unstable operation is caused by a varied load at individual load side during driving operation, the first stabilizing device operates to stabilize the system; a first transmission and a second transmission, wherein said first transmission is connected to receive power from the second end of the first continuous variable transmission and said second transmission is connected to receive power from the second end of the second continuous variable transmission;; a user interface arranged to control the operation of the single power source, the first continuous variable transmission and/or the second continuous variable transmission; wherein the first wheel group and the second wheel group installed at the load perform speed differential operation, the first continuous variable transmission and the second continuous variable transmission individually regulate speed ratio according to the respective load variation of the first wheel group and the second wheel group installed at the load, so as to facilitate the speed differential operation drive between the first wheel group and the second wheel group at the load. a single power source; a first continuous variable transmission and a second continuous variable transmission operable to automatically change a respective speed ratio according to a load state on a respective first wheel set and second wheel set, each of said continuous variable transmission having a first end connected to receive power from the single power source; a first stabilizing device having dual-end shafts, each end being connected to a respective second end of the first continuous variable transmission and the second continuous variable transmission or between driven load sides, said first stabilizing device having the functions of setting coupling torque and sliding damping formed by fluid viscosity effect, fluid damping effect, mechanical friction effect, or electromagnetic eddy current effect or power generation anti-torque effect, if unstable operation is caused by a varied load at individual load side during driving operation, the first stabilizing device operates to stabilize the system; a first transmission and a second transmission, wherein said first transmission is connected to receive power from the second end of the first continuous variable transmission and said second transmission is connected to receive power from the second end of the second continuous variable transmission;; a user interface arranged to control the operation of the single power source, the first continuous variable transmission and/or the second continuous variable transmission; wherein the first wheel group and the second wheel group installed at the load perform speed differential operation, the first continuous variable transmission and the second continuous variable transmission individually regulate speed ratio according to the respective load variation of the first wheel group and the second wheel group installed at the load, so as to facilitate the speed differential operation drive between the first wheel group and the second wheel group at the load.