Compared the pure car carrier guides of BV and CCS, the similarities and differences and selection of working conditions, design load and boundary conditions in the guides are analyzed. For a Pure Car and Truck Carrier (PCTC), CCS and BV guides are used to calculate the structure strength to find out and optimize the key nodes. The reasons for the difference of calculation results are analyzed and the local structure of PCTC is strengthened, so that the structure of PCTC meets the requirements of the guides.