In order to optimize the process of indirect squeeze casting, computer aided engineering (CAE) technology was used to predict casting defects. Taking an adapter ring casting as an example, its 3D-model was established and its casting process was designed. The results indicate that, for indirect squeeze casting, when the liquid metal injects to mold cavity by casting system, temperature of liquid metal has dropped and started to solidify. At the same time, the runner has begun to solidify. If the cross-section of runner is too small, the runner pressure has not passed the casting to produce the effect of feeding, therefore this problem will lead to casting defects such as shrinkage cavity. As a result, full consideration should be given to the feeding effect of the runner in mold design. Simulation software can be used to simulate the temperature field of casting filling and solidification to design the runner reasonably.