Abstract: Silicon waveguide slow-light devices are essential components of next generation information technologies, such as all-optical smart interconnection and real-time high-speed detection and manipulation. This is because, with the innovations in micro-electronic fabrication and silicon waveguide design, they have many potential applications in optical telecommunication and optical signal processing. This review starts with the principle of slow-light in silicon waveguides and recent research progress, focusing on devices based on microring resonators in silicon. Finally, the advantages of these devices are discussed.