Part qualities are always important concern in injection molding process. Part qualities may include dimension accuracy, various part properties and surface appearance. Control of dimension accuracy definitely related the material shrinkage which also depends on the thermal-mechanical history of the molding process. Due to the difference in pressure, temperature as well as shear rate, etc., the induced molecular orientation and the associated shrinkage are also different in various location of the molded part resulting in the anisotripic behavior and the uneasy control of dimension accuracy. The quantitative description of the anisotrpic shrinkage can be measured from the pressure and temperature variation path in the PVT (Pressure-specific volume-temperature) diagram. To achieve uniform shrinkage requires various PVT paths pass through or come close to a common point when the mold is open. The relevant packing process control, particularly the profiled packing pressure is a necessity to meet this purpose. In this study, the intelligent optimization of the packing process in a strip mold were conducted based on the PVT paths at three locations, namely, near-gate, around part middle and near flow end locations where pressure and infrared temperature sensors are flush mounted on the cavity surface. Maximum packing pressure and various time intervals are employed to check the PVT paths characteristics at the three designated locations. From the effective influence one can first decide the suitable time intervals for the three stage packing process. Afterwards, the pressure values at the three stage packing were adjusted. The optimal values are those leading to PVT paths come close to a common point at the PVT diagram. The referred common point can be determined based on the designed shrinkage value and can be dynamically monitored online. The experimental results do verify the proposed idea. Keyword: PVT path, profiled packing pressure, three-stage packing, high precision