Abstract: Dielectric properties such as relative permittivity dielectric constant ε’, dielectric loss ε" and dissipation factor tanδ of doped Lignin Resin with different doping ratios of rhodamine B (0.02, 0.04, 0.06, 0.08, 0.1) wt.% as function of temperature in the range 30-120°C and frequency in the range 100 Hz-1 MHz. The experimental results showed that ε’, ε" and tanδ increased with increasing temperature and is due to greater freedom of movement of the dipole molecular chains within polymer at high temperature. The value of ε’ decreased with increasing frequency which indicates that the major contribution to the polarization comes from orientation polarization. Ac conductivity F ac and impedance (Z) of doping polymer behaviors as function of frequency and temperature have also been investigated.