The cavity coupled linac(CCL)is the important normal conducture accelerating structure for the high energy accelerator.It had been studied in deeply in the foreign country.We do the design and calculation for the CCL in primary,which includes the design and simulation of the EM field and the multi-energy output.We calculated about 100 types of cavity at The cavity coupled linac (CCL) is the important normal conducture accelerating structure for the high energy accelerator. It had been studied in deeply in the foreign country. We do the design and calculation for the CCL in primary, which includes the design and simulation of the EM field and the multi-energy output. We calculated about 100 types of cavity at