Laojunmiao oilfield has entered the high water cut oil production period. The remaining oil is difficult to be effectively displaced. According to evaluation on geology development characteristics and fluid properties of Laojunmiao L-reservoir, it is believed that it is suitable for Laojunmiao L-reservoir to use foam combination flooding method to enhance oil recovery. After the completion of the well network construction, pilot testing well group optimization, reservoir engineering research, flooding agent evaluation and optimization, it is clear that the flooding system has a good injection capacity and oil displacement performance in flooding test. Injection technology, production organization and technical management are able to meet field test. It provides l reference for optimization design and efficient execution of pilot test.