The invention discloses a making method of puff pastry sesame seed cakes. The making method comprises the thirteen steps of making fillings, performing dough mixing for the first time, performing dough recovery, performing dough mixing for the second time, performing the process of making crusts through coating oil-mixed dough with water-oiled dough, performing shortening, wrapping the fillings, performing rolling, performing splitting, brushing a baking pan with oil, performing brushing with syrup, performing roasting for the first time and performing roasting for the second time. Through the thirteen steps in the making method disclosed by the invention, the bottlenecks that conventional sesame seed cakes are difficult to store, and the fermentation process is greatly influenced by weather are broken through by the produced sesame seed cakes; besides, the products made through the steps are different from conventional circular sesame seed cakes in appearance and are rectangular; openings are formed in two sides of each sesame seed cake; and the puff pastry sesame seed cakes are thin in crusts, golden in color, loose and layered, crisp like scales, free from greasy taste, short in roasting time, crisp in mouth feel, good in storage stability, golden in color, loose and layered, and crisp like scales, and are deeply loved by vast consumers.