Since the water injection development in Laozhuang Block in 2012, the well pattern of injection and production has been gradually improved, and better water injection effect has been achieved. This paper comprehensively analyzes the well pattern density, water drive control degree, water drive use degree, oil recovery speed, water injection effectiveness and water injection utilization in this block. It is concluded that the current well pattern density of Laozhuang block is within the reasonable range; The water drive control degree of the block is third class; The oil production speed of the block is low, so water injection should be strengthened to improve the oil production speed. The water cut rising rate in the block is stable, and the water cut rising rate needs to be adjusted and controlled. The water retention rate of the block gradually increases with the degree of recovery, and the cumulative water retention rate at the present stage is small compared with the theoretical value, so it is necessary to strengthen the relevant conclusions of water injection. It provides theoretical support for the next comprehensive adjustment and treatment of this block.