The invention discloses a making method of passion fruit vinegar, and relates to the technical field of food vinegar brewing. The method comprises the following steps: squeezing whole passion fruits as a raw materials in order to obtain a juice, adding a high-alcohol-degree wine into the passion fruit juice to prepare a fruit wine, and adding the fruit wine to pure water in order to obtain a fruit wine mixed liquid; and carrying out mixed fermentation on parts of the fruit wine mixed liquid and acetic acid bacteria to obtain an acetic acid mother liquor, continuously fermenting the acetic acid mother liquor and the residual fruit wine mixed liquid to obtain a primary product of passion fruit vinegar, sterilizing, and storing to obtain the finished passion fruit vinegar. Certain technological conditions are controlled in the making process in order to make the obtained passion fruit vinegar have a unique fresh passion fruit flavor and a bright color, and the passion fruit vinegar has the characteristics of good taste, long shelf life, stable quality and bright color.