The water flooding oil layers in the Sazhong Development Zone have long well sections for exploitation and prominent interlayer contradictions, the qualified rate of water injection and production have declined rapidly, conventional testing and adjustment technologies are difficult to meet the dual control requirements, in response to the above problems, the pre-installed cable intelligent testing and adjustment technology has been developed and promoted. This technology is a ground wireless remote control system based on the Internet of Things in oil fields. It integrates multi-information testing and flow control into a unified downhole testing device that is permanently placed downhole, it consists of two parts: the downhole process string and the ground remote control system, it achieves control and remote intelligent adjustment of downhole water distributors through an internal cable.This technology can effectively enhance the efficiency of measurement and adjustment as well as the qualification rate of stratified water injection, it has formulated the optimization and adjustment process of water injection schemes for intelligent stratified injection wells and the analysis chart of the nature of stratified injection segments for intelligent stratified injection, which effectively guides the adjustment and optimization of water injection schemes and achieves the dual control goals of “improving the utilization degree of oil layers and controlling the natural decline of old wells”. The unique real-time dynamic stratification data and remote control makes up for the shortcomings of low well stratification data and high test cost in the dynamic analysis of waterflood development, and realizes the qualitative transformation of waterflood development from whole well to interval from timing to real-time monitoring and adjustment, which is of great significance for accurately guiding the adjustment of waterflood development.