Inhaul cable type energy dissipation support and energy dissipation method thereof

The invention relates to an inhaul cable type energy dissipation support. The inhaul cable type energy dissipation support comprises a middle positioning plate and prestress steel cable units on the left side and the right side; each prestress steel cable unit comprises a connecting joint, a supporting core component, an outer sleeve steel pipe, a sliding bearing plate, a stabilizing steel bar, asupporting frame, a prestress steel cable and a friction plate; the middle positioning plate is fixed on the inner side of the outer sleeve steel pipe; the supporting core component, the sliding bearing plate and the stabilizing steel bar are sequentially connected from outside to inside and integrally slide in the outer sleeve steel pipe; the friction plate is fixed in the outer sleeve steel pipethrough the supporting frame and makes contact with the inner end of the stabilizing steel bar, and the contact area between the friction plate and the stabilizing steel bar is changed along with sliding of the stabilizing st