<p>Terpyridine-lanthanide (tpy-Ln) metallo-supramolecular polymers have garnered significant attention in supramolecular chemistry, coordination chemistry and materials science on account of the rigid structure, tunable electronic properties and strong coordination ability of tpy, as well as the unique electronic configuration and remarkable optical, magnetic properties of lanthanides. Over the past decade, the development of tpy-Ln metallo-supramolecular polymers has experienced rapid growth. This review provides an overview of recent progress in tpy-Ln metallo-polymers, covering both crystalline structures and amorphous forms. We focus on the synthesis of these metallo-polymers, with particular emphasis on their structural diversity and self-assembly strategies. Notably, we highlight their promising applications as luminescent materials, chemical sensors, and magnetic materials. Ultimately, this review aims to inspire further exploration into the rational design and synthesis of functional tpy-Ln metallopolymers with enhanced structural precision and enriched functionality, paving the way for their integration into emerging technological applications.</p>