Aiming at the present development situation of Jurassic reservoir in ZJ2 well-area of Jing'an Oilfield,the authors analyzed the waterflood status of the reservoir and themain reason of therising watercut,and then formulated areasonable boundary of the development technique ratios,such as thefluid producing intensity and velocity and the injection-production ratio, at last proposed the adjustment to improve the waterflood state of the reservoir.