The invention discloses engineering machinery and a telescopic boom frame of the engineering machinery. The telescopic boom frame comprises a first boom section (20), a second boom section (30) and a third boom section (40) which are sleeved from outside to inside in sequence, wherein the telescopic boom frame further comprises a telescoping mechanism (10); the telescoping mechanism comprises a first hydraulic cylinder and a second hydraulic cylinder; the first hydraulic cylinder comprises a first cylinder body (11) and a first piston rod (12); the second hydraulic cylinder comprises a second cylinder body (14) and a second piston rod (15); the first cylinder body and the second cylinder body are fixedly connected to form a cylinder assembly; the first piston rod and the second piston rod extend out in reverse directions; the cylinder assembly is connected to the second boom section; the first piston rod is connected to the first arm section; and the second piston rod is connected to the third boom section. A steel wire rope is not needed, and large arrangement space does not need to be reserved on the boom section on the innermost side, so that the section and weight of the boom frame are small, and the vehicle performance is improved. Besides, the rigidity of the boom frame can be further increased, and the stability of the telescopic boom frame is improved.