Based　on　the　principle　of　closed-loop　fiber　optic　gyroscope,　the　research　results　in　the　field　of　interferometric　fiber　optic　gyroscope　digital　closed-loop　system　modeling　and　control　were　summarized　in　this　paper.　The　PID　control　model　has　a　relatively　simple　structure　and　has　been　widely　used.　The　F-PID　control　model　can　effectively　shorten　the　adjustment　time,　reduce　the　amount　of　overshoot,　and　has　a　strong　anti-interference　ability.　The　system　identification　modeling　method　of　the　closed-loop　fiber　optic　gyroscope　is　simple　to　implement　and　can　overcome　the　influence　of　white　noise　on　the　signal　amplitude　and　phase　detection.　In　view　of　the　closed-loop　fiber　optic　gyroscope　model,　the　method　of　suppressing　the　dead　zone　of　the　fiber　optic　gyroscope　was　discussed.　Based　on　the　dynamic　model　of　the　closed-loop　fiber　optic　gyroscope,　the　method　to　improve　the　angular　acceleration　tracking　ability　of　the　fiber　optic　gyroscope　was　analyzed.　Finally,　combined　with　the　technological　progress　of　optoelectronic　devices,　the　future　researches　in　the　field　of　fiber　optic　gyroscope　modeling　and　control　were　prospected.　©　2021　IEEE.