Abstract: A laboratory simulation device for the performance test of the ventilator was developed. The main ventilator and ventilation tunnel in the mine were reduced based on a certain similarity ratio, and special instruments were used to measure the parameters of ventilator operating conditions. After the standard data processing, the characteristic curves of the ventilator could be obtained, so that the students who do not have the field practice conditions could be familiar with and master the performance test method of the ventilator in the laboratory. The structure of the experimental device and the principle of fan performance test are introduced, and the simulation test is carried out.