Wang, D. Cui, X. Gao, J. Ji, D. Liu, Y.D. Meng, C. Wang, N. Yu, C.H. Zhai, J.Y. Zhang, Y. JACoW Publishing Geneva, Switzerland 978-3-95450-216-5 10.18429/JACoW-eeFACT2018-TUPAB06 English 146-151 TUPAB06 booster injection collider emittance optics Contribution to a conference proceedings 2019 2019-04 https://doi.org/10.18429/JACoW-eeFACT2018-TUPAB06 http://jacow.org/eefact2018/papers/tupab06.pdf The CEPC booster needs to provide electron and positron beams to the collider at different energy with required injection speed. A 10 GeV linac is adopted as the injector for CDR. Then the beam energy is accelerated to specific energy according to three modes of CEPC collider ring (H, W and Z). The geometry of booster is designed carefully in order to share the same tunnel with collider. The design status of booster including parameters, optics and dynamic aperture is discussed in this paper.