The invention provides a signal conditioning device used for an inductively coupled plasma (ICP) acceleration sensor. The signal conditioning device used for the ICP acceleration sensor comprises a first power supply module, a second power supply module, a constant flow source module, a sensor interface module, an alternating current coupling module, a filtering and amplifying module, a signal output module and an integrated operational amplifier power supply module, wherein the first power supply module and the second power supply module are respectively connected with a change-over switch, the constant flow source module is connected with the change-over switch and connected with the first power supply module and the second power supply module under the control of the change-over switch, the sensor interface module is connected with the ICP acceleration sensor, the ICP acceleration sensor outputs a detecting signal according to constant current when works, the alternating current coupling module is connected with the sensor interface module, the filtering and amplifying module is connected with the alternating current coupling module, the signal output module is connected with the filtering and amplifying module, and the integrated operational amplifier power supply module is connected with the filtering and amplifying module. According to the signal conditioning device used for the ICP acceleration sensor, phase changes of signals in a certain range can be little after the signals through filtering, accordingly balance errors caused by phase shift in rotor dynamic balancing are reduced, and dynamic balance quality is improved.