Bare fiber grating is easy to break due to the loss of coating protection in high temperature environment. A metal-tube-packaged high temperature resistant fiber grating temperature sensor is proposed. Stainless steel tube was used to package pure-silica fiber gratings inscribed by femtosecond laser. Temperature characteristics were studied in the range of 100 ~450 ℃. The experimental results show that the sensitivity coefficient of the sensor is 12.7 pm/ ℃ and the linear fitting coefficient reaches up to 0.995. The sensor displays good repeatability. The method of packaging is simple and convenient. The packaged sensor has good stability and high mechanical strength,and can be used for high temperature measurement in engineering applications.