Front girder pitching mechanism and quay crane

The invention provides a front girder pitching mechanism and a quay crane, and the front girder pitching mechanism comprises a front girder which comprises a front section part and a rear section part, the rear section part is hinged to a trapezoidal frame, and the front section part is hinged to the rear section part; the traction piece is connected between the trapezoidal frame and the front section part; in the process that the rear section part tilts up relative to the front girder, when the bending angle of the front section part relative to the rear section part reaches a preset value, the traction piece is connected with the rear section part so that the bending angle of the front section part relative to the rear section part can be kept at the preset value. According to the arrangement, a traction system in the prior art is improved, so that the traction system can be connected with the rear section part of the front girder while the traction function is kept, the included angle between the front sec