The invention discloses a nitrogen-containing seven-membered heterocyclic derivative compound, a preparation method thereof and an application of the compound, and belongs to the technical field of semiconductors. The structure of the organic compound is as shown in a general formula as shown in the specification. The compound has higher glass transition temperature, molecular hear stability and Eg and suitable HOMO and LUMO energy level, a device structure is optimized, photoelectric property of an OLED (organic light emitting diode) can be effectively improved, and the service life of the OLED can be effectively prolonged.