Siloxane polymers constitute a category of organic-inorganic hybrid polymers that manifest properties arising from both their organic side groups and inorganic backbone. This unique combination confers upon these polymers exceptional physical and chemical characteristics. Within siloxane polymers, the highly optical transparent cyclosiloxane-containing polymers emerged as a favorable candidate for excellent performance in thermal resistance, ion selectivity and permeability, dielectric properties, and processibility. This review aims to present a comprehensive overview of cyclosiloxane-containing polymers' preparation, properties, and applications. The synthesis methods and kinetics pertinent to these polymers are concisely summarized. Additionally, a detailed exposition is provided on cyclosiloxane's optical, mechanical, dielectric, and thermal properties. The inherent weaknesses of these polymers are thoroughly examined, and corresponding remedial strategies are discussed. The conventional applications of cyclosiloxane-containing polymers span diverse domains, including nanoimprinting, separation processes, coating, thermal interface materials, and ceramic precursors. Recent applications such as 3D printing ink and lithium battery electrolyte are also included in the review, showcasing the versatility and potential of the hybrid material.