Based on the current situation of the pilot new rural finance and the present status of supervision in Jiangsu Province，this paper uses the BCL model to value the financial supervision performance in the rural micro-credit companies. The empirical results show that the ratio of small loan has a significantly positive correlation with micro-credit companies operation efficiency, while ratio of agricultural loans has a positive correlation only in the north of Jiangsu. Ratio of medium and long-term loans has a significantly negative correlation with micro-credit companies operation efficiency in Jiangsu Province and the south of Jiangsu. External financing index has a positive correlation with micro-credit companies operation efficiency. Interest rate also has a positive correlation with micro-credit companies operation efficiency. The relationship between regional per capita GDP and the micro-credit companies operation efficiency is not significant. Numbers of financial institutions have negative impact on micro-credit companies operating efficiency.