Abstract: Integrated testing and allocating technologies are used for hollow water segregator in water injection wells to aim at the issues such as the huge difficulties in the testing, the low accuracy in the allocating, the high cost and the long time it takes. According to the theory of mechanical and electrical integration, we adopt the method of testing the injection well while the allocating is going on to make these two processes successful. So while down the instrument to the hole once, the testing and allocating for all layers could be finished. This technology has increased the accuracy of flow regulation, reduced the workload, and greatly raised the efficiency. Pilot test with 9 operations has launched and the success rate of treatment has reached to 100% with 90% allocating accuracy.