Myocardial revascularrization by laser is a kind of operation which uses laser beam to converge on the surface of myocardium and punch from epicardium to endocardium. The blood in heart can directly make nutrition for myocardium. It is not neeessery to incise heart and put into bridging operation. Experimental results are reported about punching minute holes in myocardium of animals (i. e pig, dog, or sheep) by CO2 laser to improve the myocardial microcirculation.