Disclosed is a liver specific delivery (LSD)-based entecavir antiviral prodrug, i.e., a nucleoside cyclic phosphate compound, and the application thereof. Specifically, disclosed are a compound as represented by formula (I) and isomers, pharmaceutically acceptable salts, hydrates, and solvates of the compound, and a corresponding pharmaceutical composition. Also disclosed is the application of the compound of the present invention, used separately or used in combination with other antiviral drugs, against viruses, especially the application against hepatitis B virus (HBV).