A heterocyclic compound, wherein the heterocyclic compound has a structure represented by Formula I: wherein in Formula I, X is independently selected from C(R 2) or an N atom, at least one X is selected from an N atom, and X bonded to Ar 1, Ar 2 or L is selected from a C atom; X 1 is independently selected from a C atom or an N atom; R 2 is independently selected from any one of hydrogen, deuterium, tritium, halogen, cyano, nitro, substituted or unsubstituted C1 to C12 alkyl, substituted or unsubstituted silyl, substituted or unsubstituted C1 to C12 alkoxy, substituted or unsubstituted C3 to C12 cycloalkyl, substituted or unsubstituted C2 to C12 heterocycloalkyl, substituted or unsubstituted C6 to C30 aryl or substituted or unsubstituted C2 to C30 heteroaryl; Ar 1 and Ar 2 are independently selected from any one of substituted or unsubstituted C6 to C30 aryl or substituted or unsubstituted C2 to C30 heteroaryl; L 1 and L 2 are independently selected from any one of a single bond, substituted or unsubstituted C6 to C30 arylene or substituted or unsubstituted C2 to C30 heteroarylene; Ra is independently selected from any one of hydrogen, deuterium, halogen, cyano, nitro, substituted or unsubstituted C1 to C12 alkyl, substituted or unsubstituted silyl, substituted or unsubstituted C1 to C12 alkoxy, substituted or unsubstituted C3 to C12 cycloalkyl or substituted or unsubstituted C2 to C12 heterocycloalkyl; n 0 is independently selected from 0, 1, 2, 3, 4 or 5, when n 0 is greater than 1, two or more Ra are the same as or different from each other, or two adjacent Ra are joined to form a substituted or unsubstituted benzene ring; L is independently selected from any one of the following groups: wherein R 1 is independently selected from any one of hydrogen, deuterium, halogen, cyano, nitro, substituted or unsubstituted C1 to C12 alkyl, substituted or unsubstituted silyl, substituted or unsubstituted C1 to C12 alkoxy, substituted or unsubstituted C3 to C12 cycloalkyl or substituted or unsubstituted C2 to C12 heterocycloalkyl; n 1 is independently selected from 0, 1, 2, 3 or 4; n 2 is independently selected from 0, 1, 2 or 3; when n 1 is greater than 1, two or more R 1 are the same as or different from each other, or two adjacent R 1 are joined to form a substituted or unsubstituted benzene ring; with the proviso that one or more hydrogens in at least one group of Ar 1, Ar 2, L, L 1, L 2, R 2 or Ra are substituted with a group represented by Formula III: Rx is independently selected from any one of hydrogen, deuterium, cyano, nitro, halogen, substituted or unsubstituted C1 to C12 alkyl, substituted or unsubstituted C2 to C12 alkenyl, substituted or unsubstituted C3 to C12 cycloalkyl or substituted or unsubstituted C2 to C12 heterocycloalkyl; and the following compound is excluded from the heterocyclic compound: wherein in Formula I, X is independently selected from C(R 2) or an N atom, at least one X is selected from an N atom, and X bonded to Ar 1, Ar 2 or L is selected from a C atom; X 1 is independently selected from a C atom or an N atom; R 2 is independently selected from any one of hydrogen, deuterium, tritium, halogen, cyano, nitro, substituted or unsubstituted C1 to C12 alkyl, substituted or unsubstituted silyl, substituted or unsubstituted C1 to C12 alkoxy, substituted or unsubstituted C3 to C12 cycloalkyl, substituted or unsubstituted C2 to C12 heterocycloalkyl, substituted or unsubstituted C6 to C30 aryl or substituted or unsubstituted C2 to C30 heteroaryl; Ar 1 and Ar 2 are independently selected from any one of substituted or unsubstituted C6 to C30 aryl or substituted or unsubstituted C2 to C30 heteroaryl; L 1 and L 2 are independently selected from any one of a single bond, substituted or unsubstituted C6 to C30 arylene or substituted or unsubstituted C2 to C30 heteroarylene; Ra is independently selected from any one of hydrogen, deuterium, halogen, cyano, nitro, substituted or unsubstituted C1 to C12 alkyl, substituted or unsubstituted silyl, substituted or unsubstituted C1 to C12 alkoxy, substituted or unsubstituted C3 to C12 cycloalkyl or substituted or unsubstituted C2 to C12 heterocycloalkyl; n 0 is independently selected from 0, 1, 2, 3, 4 or 5, when n 0 is greater than 1, two or more Ra are the same as or different from each other, or two adjacent Ra are joined to form a substituted or unsubstituted benzene ring; L is independently selected from any one of the following groups: wherein R 1 is independently selected from any one of hydrogen, deuterium, halogen, cyano, nitro, substituted or unsubstituted C1 to C12 alkyl, substituted or unsubstituted silyl, substituted or unsubstituted C1 to C12 alkoxy, substituted or unsubstituted C3 to C12 cycloalkyl or substituted or unsubstituted C2 to C12 heterocycloalkyl; n 1 is independently selected from 0, 1, 2, 3 or 4; n 2 is independently selected from 0, 1, 2 or 3; when n 1 is greater than 1, two or more R 1 are the same as or different from each other, or two adjacent R 1 are joined to form a substituted or unsubstituted benzene ring; with the proviso that one or more hydrogens in at least one group of Ar 1, Ar 2, L, L 1, L 2, R 2 or Ra are substituted with a group represented by Formula III: Rx is independently selected from any one of hydrogen, deuterium, cyano, nitro, halogen, substituted or unsubstituted C1 to C12 alkyl, substituted or unsubstituted C2 to C12 alkenyl, substituted or unsubstituted C3 to C12 cycloalkyl or substituted or unsubstituted C2 to C12 heterocycloalkyl; and the following compound is excluded from the heterocyclic compound: