The encapsulating technique of fiber Bragg grating（FBG） for the intelligent clothing and the comparison of temperature sensitive characteristics between encapsulated fiber and bare fiber are introduced.FBG sensor is embedded into clothing to measure body temperature.It can monitor the health of people who wear the intelligent clothes.An encapsulation technique of FBG for the intelligent clothing is suggested.By selecting the appropriate encapsulating materials

and having a reasonable encapsulation technics process

a good linear relationship of the encapsulated FBG temperature sensor changes in the wavelength and the human body temperature changes is shown

and its sensitivity is 30.3 pm/℃.The comparison of the experimental results between encapsulated fiber and bare fiber indicate that the temperature sensitivity coefficient of the encapsulated FBG sensor is about 3 times as much as that of bare FBG.