The invention provides an organic electroluminescent material and an organic light-emitting device thereof, and belongs to the technical field of organic photoelectric materials. A structure of the organic electroluminescent material, provided by the invention, contains a chrysene structure, wherein chrysene, anthracene, phenanthrene and fluorene are common main structures. The organic electroluminescent material has a high triplet energy level, but the organic electroluminescent material is easy to crystallize. The organic electroluminescent material increases molecular volume by linking other aryl or heteroaryl groups, and effectively avoids crystallization. In addition, by linking the sulfone, phosphine oxide, silicon and other groups in a molecule, a conjugated structure is effectivelyinterrupted, the triplet energy level is higher, and an energy barrier between HOMO and LOMO is larger, so that the organic electroluminescent material is more favorable for being used as a blue light-emitting material; in addition, attachment of groups such as sulfone or phosphine oxide facilitates electron transport and balances carrier transport. Drive voltage is reduced. Compared with the prior art, the organic electroluminescent material is applied to the organic light-emitting device, particularly to be used as the blue light-emitting material in a light-emitting layer, has relatively high luminous efficiency and a low driving voltage.