To solve the problem of large dispersion of tightening force in the tightening process of aero-engine bolted connection based on the torque method, and to explore a more convenient and efficient optimization method of bolt tightening force loading process, a digital technology of bolt tightening load based on MATLAB–GUI was proposed based on torque method tests. A virtual bolt loading platform was built, and the virtual loading effect evaluation was carried out under different lubrication conditions with the torque angle method as an example. The tightening force under the two correction strategies has different improvement effects, which provides a new way to explore the optimization method of bolted connection tightening force loading process.