High-stability large-shear lifting machine

The utility model discloses a large shear lifting machine with high stability. The pair of multifunctional scissors comprises two underframe assemblies, the interiors of the underframe assemblies aremovably connected with female scissor outer arm assemblies through pin shafts, the interiors of the female scissor outer arm assemblies are movably connected with female scissor inner arm assemblies through pin shafts, and the surfaces of the female scissor inner arm assemblies are movably connected with the inner walls of the underframe assemblies through pin shafts. According to the utility model, the female shear outer arm assembly, the female shear inner arm assembly, the female shear safety rack seat assembly, the female shear main oil cylinder assembly and the female shear safety pawl assembly are arranged; by arranging the auxiliary shear inner arm assembly, the auxiliary shear outer arm assembly, the auxiliary shear main oil cylinder assembly, the auxiliary shear safety rack base assembly and the auxiliary