An alkaline hydrolysis process of TNT (trinitrotoluene) comprises: adding KOH solution and scrapped TNT explosive sequentially into a heating reactor for the purpose of reaction, delivering the reacted mixture to an adjusting tank for pH adjustment, delivering the mixture into a benzene-water separator to separate benzene substances and saline solution; delivering the saline solution, from an upper opening of the benzene-water separator, into a stirring adjuster, adding elements N and P, delivering material from an outlet of the stirring adjuster into an evaporative concentration column, delivering discharged liquid from the bottom of the evaporative concentration column into a spraying drying column from its top, and collecting an organic environment-friendly composite fertilizer from thebottom of the spraying drying column; delivering benzene substances from a bottom opening of the evaporative concentration column into a vacuum distillation column, and collecting nitrotoluene from the top of the vacuum distillation column and other benzene substances from the bottom of the vacuum distillation column. The vacuum distillation column of TNT provides deenergization and environment-friendly recycling for TNT explosive.