The invention relates to the field of medical instruments, in particular to a multifunctional treatment catheter. The multifunctional treatment catheter comprises a catheter body and a balloon wrapping the outer wall of the catheter body, wherein a micro-catheter is arranged in the catheter body, the inner part of the micro-catheter is hollow to form a micro-catheter inner cavity channel, a suction inlet is formed in the near end of the catheter body, and a pressurizing inlet is further formed in one side of the near end of the catheter body; the catheter body is a three-cavity catheter whichis not in communication with the catheter body, the three-cavity catheter comprises a suction cavity channel, a pressurizing cavity channel and a micro-catheter inner cavity channel, the suction cavity channel communicates with the suction inlet, the pressurizing cavity channel communicates with the pressurizing inlet, and the catheter not only can block blood flow, but also has a thrombus suctionfunction. The micro-catheter is arranged in the multifunctional treatment catheter, and a thrombectomy stent can be conveyed for mechanical thrombectomy. When catheter thrombus suction is performed,stent thrombus taking can be performed at the same time, so that the operation time is shortened, and expenses borne by a patient and medical insurance expenses are reduced.