Abstract: With Lilium davidii var. as the research objects, the relationships between dielectric parameters and levels of Lilium davidii var. were studied with parallel-plate electrode system in the rang of 50HZ-1MHZ. The results show that the relative dielectric constant and electric conductance increase and the equivalent impedance valve decrease with the improvement of lily’s level under definite frequency. The electric conductance increase and equivalent impedance value and relative dielectric constant decrease with the increase of frequency. As a result, equivalent impedance value, relative dielectric constant and electric conductance can be used as norm parameter of lily’s level. However impedance phase angle, quality factor, loss coefficientnetc are not relevance relation with the level of Lilium davidii var.