The invention belongs to the technical field of heat exchange and relates to a novel nitrogen condensation type natural gas heat exchanger. The novel nitrogen condensation type natural gas heat exchanger comprises a heat exchange core body. A natural gas inlet is formed in the axial end of the heat exchange core body and connected with a first sealing end in a sealed manner, a natural gas outlet is formed in the other axial end and connected with a third sealing end in a sealed manner, and a first temperature measurement opening is formed in the third sealing end. A nitrogen outlet is formed in the end, close to the natural gas inlet, of the heat exchange core body. A third temperature measurement opening is formed in the nitrogen outlet. The end, close to the natural gas outlet, of the heat exchange core body is provided with a nitrogen inlet. A second temperature measurement opening is formed in the nitrogen inlet. The novel nitrogen condensation type natural gas heat exchanger is simple and reasonable in structure and high in heat exchange efficiency; and due to the fact that the unique temperature measurement openings are designed on the novel nitrogen condensation type natural gas heat exchanger, the heat exchange process can be detected in real time, and the working condition of the heat exchanger can be known conveniently at any time.