Aim To study the instantaneous therapeutic effects of intracoronary stent implantation(ICSI) for treating CHD. Methods 54 consecutive patients 60 balloon-expanding stents were implantated in 60 coronary artery lesions. Quantitative coronary angiography was used to analyse the changes of minimal lumen diameter and minimal cross-section area in target vessel segment before and after treatmernt. Results The immediate increments of lumen diameter were 2.02±0.62 mm (67.10%±15.40%), and of cross-section area were 5.67±1.61 mm 2 (80.36%±18.29%) after ICSI. Conclusion There were excelling acute gain in ICSI, and it is a effective therapeutics of intervational cardioradiology for CHD patients.