 Organic spin tronics has been gaining increasing attention due to its potential applications in the field of electronics. This review focuses on the generation and propagation of pure spin currents, PSEs, which are charge-absence spin angular momentum flows in organic materials. The review begins with a brief introduction to the basic concepts and mechanisms behind PSEs, followed by a summary of representative experimental observations of PSEs in organic materials. Future perspectives are also discussed, focusing on single-molecule magnets, complexes for the organic ligands framework, lanthanide metal complexes, organic radicals, and 2D organic magnets. This article was authored by Nai Hongxing, Halyang Lu, and Yu Jiaxing.