The invention provides a compound containing a fused aryl group and an organic electroluminescent device thereof, and relates to the technical field of photoelectric materials. The compound provided by the invention has high electron mobility, is easy to transport electrons, can balance hole and electron transport, has high triplet state energy level and wide energy gap, and can limit excitons in a luminescent layer, thereby improving the luminous efficiency and service life of the organic electroluminescent device. On the other hand, after the bridging group L0 is introduced, the glass transition temperature and the refractive index of the compound are improved, the film forming property and the thermal stability of the material after evaporation film forming are improved, and when the compound is applied to the organic electroluminescent device, the luminous efficiency of the organic electroluminescent device can be improved, and the service life of the organic electroluminescent device can be prolonged.