An optimized strain demodulation method based on fiber Fabry-Perot (FFP) tunabl e filtering driven by a piezoelectric transducer (PZT) is proposed and experimen tally demonstrated.Using a parallel operation mode to sample data point from FFP filter continuously,the e ffect of PZT hysteresis behavior is eliminated,and system tuning frequency is increased.Non linearity of AC is also considered,and an AC-DC correction curve is proposed.Experimental results show that system actual acquisition rate can be improved by 100%,and random error of strai n measuring is decreased by 95%.Moreover,the strain sensitivity is less than 1με,and the e rror between the practical value demodulated by the system and the theroretical value is below 4% .