Based on primary parameter analysis of the thermal infrared hyperspectral imaging system, several methods were proposed to overcome the difficulties in detecting objects with low signal energy, serious thermal infrared background radiation and other problems. A pushbrooming infrared hyperspectral imaging system was developed, which can suppress the high background radiation effectively, and the groundbased imaging experiment was realized. Based on the low background experimental results, the relationship of the system performance with different factors was analyzed, and feasibility to optimize the system performance was comfirmed.