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In this paper,we study different hole-shaped photonic crystal fiber filled E7-type liquid crystal at different temperatures and changing the refractive index of the liquid crystal by changing the temperature.Use the total internal reflection model to analysis the impact of different temperature on the transmission characteristics of the different hole-shaped photonic crystal fiber on the same wavelength and make the numerical simulation of mode field characteristic parameters.The result is a variation of the filling crystal photonic crystal fiber mode field characteristics with temperature.These laws on the promotion and application of temperature modulation photonic crystal fiber devices have some theoretical basis and reference value.