The invention puts forward a jointed PCB dividing method and a jointed PCB dividing structure. The jointed PCB dividing method comprises the steps as follows: cutting a large jointed PCB into multiple small single PCBs; and making a dividing mark in the blank space of each single PCB, wherein the dividing mark shows the production date and production batch of the single PCB, the number of single boards and other production information, namely, drawing a plurality of concentric rings in the blank space of each single PCB, setting one concentric ring as a production date ring, one concentric ring as a production batch ring and one concentric ring as a jointed board number ring, and making a single board mark on the production date ring, on the production batch ring and on the jointed board number ring. Through the jointed PCB dividing method and the jointed PCB dividing structure put forward by the invention, single boards obtained through division can be easily distinguished, and single boards can be easily traced and queried.