Crane and fly jib mounting device thereof

The utility model discloses a crane and a fly jib mounting device thereof. The fly jib mounting device comprises a first connecting rod, a second connecting rod and a driving mechanism, wherein the first end of the first connecting rod is hinged with a main jib of the crane, the first end of the second connecting rod is hinged with the fly jib of the crane, the second end of the second connecting rod is hinged with the second end of the first connecting rod, and the driving mechanism is used for driving the first connecting rod to rotate a hinge joint of the first connecting rod with the main jib. The main jib and the fly jib are connected through the first and second connecting rods of the mounting device, when the driving mechanism drives the fly jib to mount, the first and second connecting rods can be opened corresponding to enable the driving mechanism to drive the fly jib to unfold to the mounting position, human assistance is not needed to drive the fly jib, the labor intensity of workers is reduced, and the mounting efficiency is improved.