Control method of operation of electric door

The invention discloses a control method of operation of an electric door. Load current or revolving speed size of a motor is recorded every time a door body of the electric door operates. Met resistance force when the door body descends can be judged, change of torsional spring strength can be well automatically adapted, and the met resistance force of the door body can be accurately sensed for a long time according to the load current or the revolving speed size of the motor.