Ma, P.F. Guan, X. Pu, Y.H. Qiao, J. Tang, R. Wang, C.P. Wang, X.W. Xie, X.C. Xing, Q.Z. Yang, F. Yu, X.D. Zheng, S.X. JACoW Publishing Geneva, Switzerland 978-3-95450-184-7 10.18429/JACoW-IPAC2018-TUPAL073 English 1182-1185 TUPAL073 Contribution to a conference proceedings 2018 2018-06 https://doi.org/10.18429/JACoW-IPAC2018-TUPAL073 http://jacow.org/ipac2018/papers/tupal073.pdf The conceptual design of an Alvarez-type Drift Tube Linac for one proton therapy facility is described in this paper. The design optimization of the Drift Tube Linac is carried out in the principle of adopting domestic mature technologies and cost control. The error study of the Drift Tube Linac is also given in this paper.