The invention relates to a method for pasting a strainometer inside a small hole and belongs to the technical field of testing and measuring. According to the method for pasting the strainometer inside the small hole, a bakelite rod replaces a hand to simulate pressing and rolling actions of the hand and meanwhile a strainometer pasting position is accurately positioned through a pasting piece, so that the strainometer which is pasted inside the small hole into which the hand cannot stretch enables measurement of parameters such as stress-strain and torque of a transmission device shafting to be convenient.