Abstract: Due to low success rate in testing, low efficiency, large workload and large work risks of conventional eccentric separate layer injection technology and bridge eccentric separate injection technology, this paper presents this bridge concentric separated layer water injection technology. This technology is capable of integrating the adjustable water nozzle with water distributor, realizing fishing-free water distribution inside the central channel of water distribution. And the downhole tester can be operated through surface visualized direct reading to be concentrically positioned and connected with water distributor. This technology carries out flow test and allocation simultaneously, having high successful rate in testing and high technological efficiency. This technology has been used in 1 664 wells in Changqing Oilfield with 100% successful rate in operation and 96.8% acceptable rate in separate testing. The average single testing time is 4~6 h, and of some promotional value.