The utility model relates to a hair clip type rod-baffle heat exchanger comprising a cylinder body, tube plates arranged at two ends of the cylinder body, a tube side inlet water chamber and a tube side outlet water chamber, which are respectively connected on the two tube plates, and heat exchange tubes which are arranged in the cylinder body and penetrate the tube plates, wherein an annular baffle ring is axially arranged in the cylinder body, and a rod-baffle is fixedly arranged on the baffle ring; and the cylinder body comprises a straight-cylindrical upper cylinder body, an annular-cylindrical elbow cylinder body connected with the upper cylinder body and a straight-cylindrical lower cylinder body connected with the elbow cylinder body. Due to the arrangement of the upper cylinder body, the elbow cylinder body and the lower cylinder body, the length of the rod-baffle heat exchanger can be greatly reduced in the horizontal direction, and shell side fluid can run at high flow rate and enhance the shell side heat transfer under the situation of large heat exchange load and small shell side flow rate; simultaneously, the space limitation problem is solved and the temperature difference stress is reduced.