The invention provides small-molecule luminescent materials based on 1,3-benzodiazine (quinazoline) and a production method and application of the small-molecule luminescent materials based on the 1,3-benzodiazine (quinazoline), and belongs to the technical field of organic photoelectric materials. A structural formula of the luminescent materials is shown in a formula (1)as shown in the description, in theformula (1), each of R1, R2, R3, R4, R5 and R6 is selected from one of a hydrogen atom, an alkoxy group, an alkylthio group, an alkylamine group, an arylamine group, an aryloxy group, an arylthio group, an aryl group and an aromatic heterocyclic group, and at least one of R1, R2, R3, R4, R5 and R6 is an aromatic heterocyclic group. According to the small-molecule luminescent materials based on the 1,3-benzodiazine (quinazoline) and the production method and application of the small-molecule luminescent materials based on the 1,3-benzodiazine (quinazoline), the 1,3-benzodiazine (quinazoline) is introduced into TADF materials for the first time, and high luminescence efficiency is achieved. The materials are simple to synthesize, steps are short, and synthesis cycles are short. Reaction yields are high, and the yields of all the steps are higher than 70%, so that the cost is saved. The OLED luminescent efficiency is high, and the highest efficiency can exceed 20%.