The 35th annual conference on Astronomical Data Analysis Software & Systems 2025 in Görlitz, Germany

The China Space Station Survey Telescope (CSST) is a next-generation Stage-IV sky survey telescope, which is scheduled to be launched in 2027. It is equipped with five scientific instruments, i.e. Multi-band Imaging and Slitless Spectroscopy Survey Camera (SC), Multi-Channel Imager (MCI), Integral Field Spectrograph (IFS), Cool Planet Imaging Coronagraph (CPI-C), and THz Spectrometer (TS). Due to the large field of view, simultaneous multi-band photometric imaging and slitless spectroscopic surveys, various scientific objectives, and multiple scientific instruments, the on-orbit calibration strategy of CSST is complicated and challenging. The CSST On-Orbit Calibration Team mainly focused on the research of on-orbit calibration observation strategy, the reduction of observational calibration data (i.e. the development of toolkits to produce the calibration reference files), and the management of the various calibration data products, with the aim to support the automation of scientific data processing pipeline. Here we mainly introduce the on-orbit calibration strategy that are currently devised for CSST and the corresponding calibration data system.