腔耦合直线加速器(CCL)是大型质子直线加速器的关键加速结构,其加速的质子能量可从80 MeV左右到几百MeV,乃至GeV的量级。本文对CCL进行了初步物理的设计与模拟计算,包括CCL腔体的设计与模拟计算、加速结构布局的研究、束流动力学的研究。采用Supperfish程序,计算了100多个不同能量点的CCL加速腔的微波参数和机械参数,包括腔体长度、直径、加速间隙和分路阻抗等。根据计算的分路阻抗,优化比较了由DTL过渡到CCL Cavity-coupled linacs (CCLs) are key accelerating structures for large proton linacs and can accelerate proton energies from about 80 MeV up to hundreds of MeVs, or even GeVs. In this paper, the preliminary physical design and simulation of CCL are carried out, including the design and simulation of CCL cavity, the research of accelerated structure layout and beam dynamics. The Supperfish program was used to calculate the microwave parameters and mechanical parameters of the CCL acceleration chamber at more than 100 different energy points, including cavity length, diameter, acceleration gap and shunt impedance. Based on the calculated shunt impedance, the transition from DTL to CCL is optimized