A new chirped fiber Bragg grating dynamic dispersion compensator at 1550 nm band is presented by using stain-tuning characteristics of the grating, and using a narrow band fiber Bragg grating fixed on the same bent beam as a sensor for close-loop control of the dispersion compensation amount. Its typical measured data are as follows. Dispersion compensation tunable range was measured to be -1000～-1680 ps/nm; its insertion loss and dynamic response time were measured less than 1.5 dB and 50 ms, respectively.