Objective　To explore the feasibility of selective lateral circumflex femoral artery(LCFA) CT arteriography for in vivo three-dimensional display of perforators in anterolateral thigh perforator (ALTP) flap.　Methods　We selected 15 patients who required the ALTP flap for repairing soft tissue defects of low extremities. In the experimental group, the method of selective LCFA catheterization was employed. The catheter was inserted into the ostia of LCFA in healthy side of the extremity and confirmed to be in a predetermined position and fixed, then the patient was transferred to the CT room. Transcatheter injecting contrast agent 20 ml, triggering CT scan at the same time. 10 minutes later, injecting contrast agent 100 ml via median cubital vein used as a control group. The two-dimensional images obtained by CT-DICOM format and output, Mimics software (version17.0) was used to visualize the perforators of LCFA. And the anatomical parameters of LCFA were observed and measured. All data analyses were performed using SPSS version 22.0 software.　Results　In 15 patients, one case was excluded because of artery catheter insertion into deep femoral artery. In the other 14 cases, the LCFA originated from the femoral artery in 3 cases (accounting for 21.43%), and from the deep femoral artery in 11 cases (accounting for 78.57%). The diameter of the LCFA and its branches in the experimental group was larger than those in the control group. The length of the ascending, transverse and descending branches in the experimental group were longer than those of the control group. The smallest inner diameter of the ascending, transverse and descending branches in the experimental group were smaller than those of the control group. The number of perforators in the experimental group were more than the control group.　Conclusion　Selective CT arteriography of the LCFA can display the LCFA and its perforators clearly an obviously superior effect over non-selective CT angiography