The invention provides an electronic control torsion fastening method for a railway passenger car stainless steel bolt and an electric drill. The method comprises the following steps that a target torsion value which is preset and needs to be achieved by a to-be-fastened bolt/nut, first time from the time point when the electric drill is started to the time point when the torque reaches the targettorsion value experienced by the electric drill used for fastening the bolt/nut, and response time of the electric drill are acquired; the first time and the response time are analyzed to generate control time for controlling the electric drill to rotate; and according to the control time, a control signal which is the same as the control time in time is generated. By analyzing a real-time torsion value of the electric drill and the target torsion value, the error caused by the electric drill lag time information is eliminated, and the torsion value precision of bolt fastening is improved.