Testing device for monitoring operation state of heat exchanger

The invention relates to the field of general heat exchanger equipment, and particularly discloses a heat exchanger operation state monitoring test device, which comprises a test loop and a heat exchanger test piece; wherein the test loop comprises a heat supply loop, a test double loop and a cooling loop, and the heat exchanger test piece is arranged in the test double loop; the heat exchanger test piece comprises supporting legs, a lower tube box, a tube bundle assembly, an upper tube box and a shell, the supporting legs are installed on the lower tube box, the lower tube box and the upper tube box are in butt joint with the two ends of the shell respectively, and the tube bundle assembly is arranged in the shell; a pipe side inlet connecting pipe is arranged on the upper pipe box, and a pipe side outlet connecting pipe and a pipe side bypass connecting pipe are arranged on the lower pipe box; and a shell side inlet connecting pipe, a shell side outlet connecting pipe and a shell side bypass connecting pipe