With the continuous growth of industrial technology, the waste of energy is becoming more and more serious. As a kind of energy-saving, environmental protection and higher economic benefits, plate fin heat exchanger(PFHE) can effectively alleviate the resource tension. Therefore, the experimental study of plate fin regenerator is of great significance. This paper mainly introduces the mass transfer performance and working principle of the plate type heat recovery device at home and abroad. Combined with the actual situation, the test, analysis and calculation are carried out, and the design ideas and relevant equipment structure drawings after optimizing the process parameters and improving measures are proposed, so as to improve the heat exchange efficiency and reduce the production cost. Therefore, based on the fuzzy algorithm, this paper designs a PFHE model, and tests the model. The test results show that the pressure drop on both sides of the heat exchanger decreases slightly, and the number of channels on both sides increases slightly. The optimization results of this module show the applicability of fuzzy algorithm, as a modern optimization method, in the optimization design of PFHE, and the superiority of genetic algorithm in the optimization process and results compared with traditional design methods.