Special-shaped pipe and engineering machinery cab

The utility model relates to the technical field of engineering machinery and provides a special-shaped pipe and an engineering machinery cab, the special-shaped pipe comprises a periphery defined bya supporting part, an avoiding part, a connecting part and a folding part in sequence, and the supporting part comprises a first side wall and a second side wall which are intersected, so that the supporting part is bent towards the outer side of the special-shaped pipe; the receding part is bent in the direction close to the folding part, the connecting part is bent in the direction away from thesupporting part, and the folding part is bent in the direction away from the connecting part. According to the special-shaped pipe, the first side wall and the second side wall are arranged, so thatthe supporting part is bent towards the outer side of the special-shaped pipe to improve the inertia moment of the special-shaped pipe relative to the shape mandrel; the section bending resistance andthe material utilization co