The invention discloses a general operation method for reaching the given pre-tightening torque of a high-strength bolt for a tower crane. The general operation method comprises the following steps: firstly, using a climbing frame to lift a tower crane rotating assembly and a part above the tower crane rotating assembly; secondly, placing additional standard sections at the top of a crane body; thirdly, penetrating each high-strength bolt; screwing a lower nut on the corresponding high-strength bolt, screwing each lower nut to be in the place with hands and preliminarily applying pre-tightening force by using a general wrench; fourthly, clamping a first open sleeve on the corresponding lower nut, rocking a torque wrench back and forth by using special tools until the pre-tightening torque is reached; fifthly, repeating the fourth step, wherein the special tools comprise the first open sleeve, a torque amplifier and the torque wrench; the first open sleeve comprises a first lower sleeve and a first panel; an opening which can be clamped on the lower nuts is formed in the first lower sleeve. By using the operation method disclosed by the invention, the determined pre-tightening force can be given for each high-strength bolt, the operation is convenient, both labor are saved in operation, the application range is wide, mounting persons can quickly adapt the high construction efficiency is high and the safety performance is high.