In order to solve the problem of "three high synergistic effects" in artificial edge water flooding during the fine secondary development of narrow ridge block reservoirs in Shengli oilfield, the geological and development characteristics of narrow roof block reservoirs were used to comprehensive analyze to identify the distribution characteristics and genesis of the remaining oil before the secondary development. Both the economic limit fluid volume of single well and the recovery capacity of formation pressure were used to analyzed the development potential of this type reservoir before the secondary development. According to three aspects factors of geological characteristics, fluid properties and development parameters, 12 main controlling factors were selected to study the sensitivity of main controlling factors in artificial edge water flooding. The quantitative analysis method and determination principle of the sensitivity of main controlling factors in artificial edge water flooding were proposed. And the selection criteria of artificial edge water flooding in narrow ridge block reservoirs were given. The results show that the most sensitive factors mainly are geological factors and fluid factors, the development factors mostly are sub-sensitive and micro-sensitive factors, and the size of water body is the insensitive factor. The selection criteria of artificial edge water flooding in narrow ridge block reservoirs contains three type conditions: the basic condition is to meet the requirements of water flooding, the necessary condition is to meet the technical limits of oil-bearing band width and formation dip, and the other favorable factors are the selective conditions. The development practices of Shengli oilfield have proved that the selection criteria are helpful to implement artificial edge water flooding in narrow ridge block reservoirs. It is concluded that the quantitative analysis method of main controlling factors sensitivity and the selection criteria of artificial edge water flooding in narrow ridge block reservoirs can provide implement basis and theoretical guidance for the efficient development of artificial edge water flooding in narrow ridge block reservoirs.