Yang, M. Chen, F.S. Kang, W. Sun, X.J. Zhu, Y.S. JACoW Publishing Geneva, Switzerland 978-3-95450-216-5 10.18429/JACoW-eeFACT2018-WEOBB05 English 247-250 WEOBB05 dipole sextupole quadrupole booster collider Contribution to a conference proceedings 2019 2019-04 https://doi.org/10.18429/JACoW-eeFACT2018-WEOBB05 http://jacow.org/eefact2018/papers/weobb05.pdf A Circular Electron Positron Collider (CEPC) with a circumference of about 100 km, a beam energy up to 120 GeV is proposed to be constructed in China. Most mag-nets for CEPC Booster and Collider ring are conventional magnets. The quantities of the magnets are large, so the cost and power consumption are two of the most im-portant issues for the magnet design and manufacturing. The dual aperture dipole and quadrupole magnet with low current high voltage are used in the collider ring. While in the booster the dipole magnet works at very low field, so a low packing factor dipole magnet or a coil type without iron design will be investigated and chosen. In this paper, the conceptual design of the CEPC main mag-nets are in detailed and the R&D plan is presented.