The V-shaped electro-optical properties control is investigated by an equivalent circuit model. Simulation results show that genuine V-shaped form is only observed at hysteresis inversion frequency, and below and above this frequency an anomalous and normal hysteresis are observed. And the inversion frequency decreases with the resistance of ferroelectric liquid crystal (FLC) layer following logfi=-alogRLC+b. The results are in good accordance with the reported experimental results.