The invention belongs to the technical field of medical instruments, and particularly relates to a novel catheter system for achieving intracardiac intramyocardial injection of stem cells. The novel catheter system for achieving intracardiac intramyocardial injection of the stem cells comprises an induction catheter for constructing a three-dimensional reconstructed myocardial model and an injection probe for achieving multi-hole multi-point synchronous microinjection of the stem cells. The induction catheter can draw a myocardial map through a three-dimensional electrical dissection mark system to precisely position the scar myocardium; the injection probe can achieve multi-hole multi-point synchronous precise quantitative injection on the basis to reduce loss and consumption of the stem cells to be lowest and achieve multi-point targeted injection of the stem cells; meanwhile, the head-end pressure is monitored to avoid myocardial perforation and ensure the operation safety, so that the catheter system is applied to stem cell treatment of ischemic heart failure, the stem cell treatment targeting property is good, and the retention rate is high.