The invention provides an injection allocation device, and relates to the technical field of oil field downhole tools. On the plane where a liquid passing hole is opposite to a water outlet, a ceramic piece II is arranged on a movable water nozzle, a ceramic piece I is arranged on a fixed water nozzle, rectangular metering holes are transversely formed in the ceramic piece I and the ceramic piece II, and a spring I is arranged between the ceramic piece I and the movable water nozzle. The injection allocation device has the advantages that by arranging a lifting pipe and the movable water nozzle, downhole positioning butt joint and water amount adjustment of the injection allocation device and a bridge type concentric seal checking, testing and adjusting integrated tester are achieved, and the requirement for layered water distribution of highly-deviated wells and deep wells is met; and due to the unique structural design of the rectangular metering holes, the metering flow is accurate and can be calculated, the injection allocation device is matched with the bridge type concentric seal checking, testing and adjusting integrated tester, the water injection amount adjustment and packer seal checking synchronous operation are achieved through the next instrument, the water injection amount can be adjusted only by driving the movable water nozzle to ascend and descend, the adjustment precision is high, the water nozzle throwing and fishing problem does not exist, the workload is reduced, and efficiency is improved.