A voltage-following series power supply circuit, comprising: a power supply end and a ground end; a power supply module comprising an input end connected to the power supply end, and an output end for providing a power supply to two or more to-be-powered chips (203-1...203-n), the power supply module and the to-be-powered chips (203-1...203-n) connected in series between the power supply end and the ground end; and at least one auxiliary power supply module (204-1...204-m) for supplying an auxiliary power supply to the to-be-powered chips (203-1...203-n), wherein a voltage following module is further connected between the power supply end and the auxiliary power supply module (204-1...204-m) for adjusting a voltage of the auxiliary power supply according to a voltage outputting from the output end of the power supply module, and the voltage at the output end of the power supply module configured to supply a reference voltage to the voltage following module; the voltage following module comprises a power supply input end, a ground input end, a power supply output end, a comparing amplifier unit, a sampling unit, a reference voltage generating unit and a switching unit; the power supply input end is connected to the power supply end, the ground input end is connected to the output end of the power supply module, and the power supply output end is connected to the auxiliary power supply module (204-1...204-m), the ground input end configured to keep a difference between the voltage of the power output end and the voltage at the output end of the power supply module constant; the switching unit is connected to the power supply input end and the power supply output end, and the comparing amplifier unit configured to control the switching unit to turn on to increase the voltage of the power output end or turn off to decrease the voltage of the power output end; the reference voltage generating unit is connected to the power supply input end and the ground input end, and configured to supply a reference voltage to a negative input end of the comparing amplifier unit; the sampling unit is connected between the power output end and the ground input end and configured to supply an input voltage to a positive input end of the comparing amplifier unit. a power supply end and a ground end; a power supply module comprising an input end connected to the power supply end, and an output end for providing a power supply to two or more to-be-powered chips (203-1...203-n), the power supply module and the to-be-powered chips (203-1...203-n) connected in series between the power supply end and the ground end; and at least one auxiliary power supply module (204-1...204-m) for supplying an auxiliary power supply to the to-be-powered chips (203-1...203-n), wherein a voltage following module is further connected between the power supply end and the auxiliary power supply module (204-1...204-m) for adjusting a voltage of the auxiliary power supply according to a voltage outputting from the output end of the power supply module, and the voltage at the output end of the power supply module configured to supply a reference voltage to the voltage following module; the voltage following module comprises a power supply input end, a ground input end, a power supply output end, a comparing amplifier unit, a sampling unit, a reference voltage generating unit and a switching unit; the power supply input end is connected to the power supply end, the ground input end is connected to the output end of the power supply module, and the power supply output end is connected to the auxiliary power supply module (204-1...204-m), the ground input end configured to keep a difference between the voltage of the power output end and the voltage at the output end of the power supply module constant; the switching unit is connected to the power supply input end and the power supply output end, and the comparing amplifier unit configured to control the switching unit to turn on to increase the voltage of the power output end or turn off to decrease the voltage of the power output end; the reference voltage generating unit is connected to the power supply input end and the ground input end, and configured to supply a reference voltage to a negative input end of the comparing amplifier unit; the sampling unit is connected between the power output end and the ground input end and configured to supply an input voltage to a positive input end of the comparing amplifier unit.