The invention relates to an antrodia camphorate growth promoter and a method for fast producing antrodia camphorate through fermentation. The method comprises the processes of inclined surface culture, liquid state seed preparation, liquid state fermentation and solid state fermentation. In each fermentation process, one kind or the combination of several kinds of aromatic compounds such as vanillina can be added, so that the culture period of producing antrodia camphorate mycelia and encarpium through fermentation can be greatly shortened; the content of bioactive substances of antrodia camphorate triterpene is improved. Compared with the existing study and report technology, the antrodia camphorate growth promoter and the method have the advantages that the process is simple; the efficiency is high; the trace growth promoter is used; the goal of fast producing the antrodia camphorate mycelia and encarpium can be achieved; the fermentation period is reduced by more than 50 percent through being compared with that of a conventional method; the content of the antrodia camphorate triterpene is improved by 60 percent or higher; the production cost is reduced; good industrial application prospects are realized.