The utility model provides an opening and closing mechanism for a construction operation frame, comprising a torque bearing vertical rod and a pull bearing vertical rod. A connecting piece of which the upper surface is provided with a hinged shaft is respectively connected to the upper and lower parts of the torque bearing vertical rod; and the two hinged shafts are hinged with the end heads of an upper truss and a lower truss of a frame body capable of being opened and closed. At the hinged shafts, the lower truss of the frame body capable of being opened and closed are connected with a right-angle rotating rod of which the long arm end is connected with the pull bearing vertical rod by a chain block. The middle parts of the upper truss and the lower truss of the frame body capable of being opened and closed are respectively hinged with a rotating steel beam which is connected with a transverse beam of the frame body capable of being opened and closed by the chain block. The hinged shafts of the frame body capable of being opened and closed are respectively provided with a rotating region which is less than 180 degrees. The trusses of the rotating steel beams are respectively provided with a rotating region which is less than 100 degrees. The opening and closing mechanism for the construction operation frame has a whole opening and closing function, a layered opening and closing function, and a local opening and closing function. The frame body capable of being opened and closed can rotate within the range of 60 degrees every time, and can rotate to any working surfaces within the range of 180 degrees. Therefore, the obstruction caused by an architectural structure or the other reasons can be avoided. The opening and closing mechanism can be widely applicable to the construction operation frame.