In order to study the influence of dielectric materials on the characteristics of dielectric barrier discharge（DBD）in helium

a 1-D fluid model with a single dielectric covered high voltage electrode was established.The number density of metastable Helium

electron density and electric field intensity of metastable helium and the effects of dielectric materials

discharge gap and dielectric thickness on DBD characteristics are also studied by using finite element method（FEM）in the case of a frequency of 10.0 kHz and an amplitude of 2.0 kV sinusoidal voltage.The simulation results show that with the increase of the dielectric constant

the electron density and helium ion number density increase

the cumulative charge density on the dielectric surface increases and the discharge process becomes more intense and the collision power loss increases.With the increase of dielectric thickness

surface charge density and space charge density on the dielectric surface decrease

the collision power loss decreases

and the electron temperature decreases.With the increase of discharge gap

the electron density decreases

while surface charge density on the dielectric surface decreases the collision power loss and the discharge process decreases.