The invention provides a feeding regulating device of a tire building machine and a method of the device. A regulating device is arranged at the outer side of a left and a right wall board and is connected at the two sides of a feeding template through a transmission shaft arranged horizontally. A linkage cylinder of the regulating device is connected downward with a synchronous shaft whose lateral direction is connected respectively with a synchronous template and a linkage template; a lifting cylinder of the regulating device is connected with the other side of the synchronous template; thelifting oscillation of the linkage template is in side control by the linkage cylinder driving the synchronous shaft; one side of the raising oscillation of the linkage template is in linkage controlby the linkage cylinder driving the synchronous shaft, meanwhile the other side is in linkage control by the connected lifting cylinder; the falling oscillation of the synchronous template is in linkage control only by the lifting cylinder connected with the side of the synchronous template. The invention realizes the control and regulation of different lifting oscillation status of every feedingtemplate, the synchronous oscillation between the templates is realized.