To reveal the mechanism of the effect of the saliency and content fit of implantable advertising of time-honored brands in Liaoning Province on consumer purchase intention, a three relationship model was constructed based on the S-O-R theory and empirically tested. Research has shown that both the saliency and content fit of implantable advertising have a significant positive impact on consumer purchase intention, and perceived value plays a significant role in the saliency of implantable advertising; There is a significant mediating effect between content fit and consumer purchase intention. This study reveals the complex mechanism of the impact of the saliency and content fit of implantable advertising on consumer purchase intention of time-honored brands in Liaoning Province, providing theoretical support for improving the promotional effect of time-honored brands.