The invention belongs to the technical field of the electronic tablet equipment, and relates to a protecting and supporting device of the electronic tablet equipment. The protecting and supporting device of the electronic tablet equipment comprises slideways and a protection shell, wherein the slideways are arranged on the left side and the right side of the electronic tablet equipment; the left side and the right side of the protection shell are both provided with sliding rails; two slideways are positioned between the two sliding rails; the left slideway and the sliding rail on the left side of the protection shell are in sliding connection through one sliding shaft; the right slideway is in sliding connection with the sliding rail on the right side of the protection shell through the other sliding shaft; each sliding shaft can slide in the slideway and the sliding rail on the same side with the sliding shaft; the slideway and the sliding rail on the same side can rotate relative to the sliding shaft on the same side; or the left side and the right side of the protection shell of the protecting and supporting device of the electronic tablet equipment are both provided with the sliding rails; the sliding shafts which can be fixed on the left side and the right side of the electronic tablet equipment are in sliding connection in the sliding rails; and the sliding shafts can rotate in the sliding rails and can form positionable sliding connection through positioning mechanisms. The protecting and supporting device has the advantages of being simple in structure, convenient in assembling and low in cost, and has the functions of overturning, supporting and protecting the electronic tablet equipment.