Bolt and nut torque connection simulator measuring device and measuring method thereof

The invention discloses a bolt and nut torque connection simulator measuring device and a measuring method thereof.The simulator comprises a data acquisition controller, an upper computer, a bolt simulator, a torque loading device and a counter-force arm, and the counter-force arm and the torque loading device are in transmission connection with the upper side and the lower side of the bolt simulator respectively and can make the bolt simulator generate torque; a torque measuring device is arranged between the counter-force arm and the bolt simulator, the torque measuring device is vertically arranged above the bolt simulator, and the measuring method comprises the steps that a torque loading device applies a torque which is 10% of a torque nominal value to the bolt simulator, and the position of the bolt simulator at the moment serves as an angle measuring original point; the torque value is set again according to a certain proportion within the torque range of the bolt simulator; torque and angle data are c