In order to reduce the sensitivity of wavelength-temperature dependen ce for fiber Bragg grating (FBG),we demonstrate an innovative temperature compensation method.Through packaging a thinner silic a-cladding FBG with a quartz glass tube,in which the liquid with certain refractive index and negative thermo-optic coeffi cient,acting as ambient cladding,is filled,the temperature stability of Bragg wavelength shift is enhanced by utilizing the cha racteristic of Bragg wavelength blue shift,which is caused by the thermo-optic effect of ambient cladding liquid,to compensate the wavelength red shift resulting from the thermal expansion of fiber and its thermo-optic effect.In the temperature range from 25℃ to 55℃,the coefficient of 0.0022nm/℃ is achieved,which means the temperature insensitivity is enhanced by more than 5ti me s and the feasibility of this kind of temperature compensation method is verified simultaneously.Further theoretical and experime ntal researches also demonstrate that the temperature stability of Bragg wavelength can be enhanced through decreasing the silica-cla dding thickness or selecting the liquid with larger refractive index and thermo-optic coefficient.Compared with the conventional compensation method,the innovative method is easy to operate and avoids the chirps of FBG in packaging and curing process,which will supply g uides for the functional applications of FBG in fiber sensing and communications .