The invention belongs to the technical field of organic synthesis, in particular to a pyrene type asymmetrical disc-like luminous compound and a preparation method thereof. The general structural formula of the compound is shown in the specifications, wherein R1 is shown in the specifications, and n is an integer ranging from 4 to 20; and R2 is shown in the specifications, and n is an integer ranging from 4 to 20. The preparation method of the compound comprises a pyrene Friedel-Crafts acylation reaction, an intermediate product bromination reaction, a Sonogashira coupling reaction, a trimethyl silicane removing reaction and a bromination chain linking reaction. The pyrene type asymmetrical disc-like luminous compound prepared with the method takes a disc as an axis and an asymmetrical bar-shaped molecular chain as an axis, has very high fluorescence and luminous efficiency, and has wide application.