The quality of the flow field has an important effect on the performance test of the engine in the indoor test bed, and the high-quality flow field is the basis of accurate correction of the additional aerodynamic resistance in the indoor test bed. This paper compared and analyzed the difference of parameter requirements of aerodynamic flow field in the indoor test bed at home and abroad, analyzed the influence of inlet and exhaust structure of indoor test bed on flow field quality, and proposed the flow field quality evaluation parameter system with the uniformity of airflow velocity in test shop, injection ratio and total pressure distortion of inlet port as the key parameters. At the same time, some suggestions for improving the quality of flow field in domestic indoor test stand are put forward.