The utility model discloses a plate-rod combination supporting type heat exchanger which comprises a barrel body, two tube plates, multiple heat exchange tubes, multiple baffle plates and multiple baffle rings. The tube plates are arranged at the two ends of the barrel body respectively. The multiple heat exchange tubes are arranged between the two tube plates. The two ends of each heat exchange tube are fixed on the two tube plates respectively. The multiple baffle plates are arranged between the two tube plates. The multiple baffle rings are arranged between every two baffle plates. Each heat exchange tube perpendicularly penetrates through one baffle plate and one baffle ring. The baffle plates and the baffle rings are arranged parallel to the tube plates respectively. Multiple baffle rods which are arranged in parallel are arranged in the baffle rings. The plate-rod combination supporting type heat exchanger can effectively remove a stagnant zone and a heat exchange 'dead zone' of fluid in a shell pass and effectively improve heat transfer efficiency; the baffle rods play roles in supporting and fixing the heat exchange tubes, therefore, vibrating damage, caused by transverse scouring action, to the heat exchange tubes is reduced, the service life of the heat exchange tubes is prolonged, and the problem that pipe penetration of a common baffle rod heat exchanger is difficult is solved.