Large-angle stair upstairs and downstairs going device for quadruped mechanical dog and using method thereof

The invention provides a large-angle stair upstairs and downstairs device for a quadruped mechanical dog and a using method of the large-angle stair upstairs and downstairs device. The large-angle stair upstairs and downstairs device for the quadruped mechanical dog comprises positioning mechanisms fixed to the preset positions of the four legs of the quadruped mechanical dog, turnover mechanisms arranged on the positioning mechanisms and telescopic supporting mechanisms arranged on the turnover mechanisms. Wherein the telescopic supporting mechanism is arranged at the end, away from the positioning mechanism, of the overturning mechanism, the overturning mechanism is used for overturning the telescopic supporting mechanism and making contact with the ground, and the telescopic supporting mechanism is used for supporting and extending the legs of the quadruped mechanical dog by supporting the legs on the ground. The large-angle stair upstairs and downstairs device for the quadruped mechanical dog can solve th