Folding pet staircase

A folding pet staircase, wherein consists of frames (1) and treads (2), wherein, the frame (1) comprises a starting edge (11), a tread edge (12), a plurality of side edges (13) and a back plate edge (15), the side edges (13) are arranged between two sides of the starting edge (11) and two sides of the tread edge (12), the side edges (13) are arranged between two sides of the tread edge (12) and two sides of the back plate edge (15), a tread beam (14) is arranged between the starting edge (11) and the tread edge (12), a tread beam (14) is arranged between the tread edge (12) and the back plate edge (15), baffle fixing plates (151) are embedded in the starting edge (11), the tread edge (12) and the back plate edge (15), a front side edge fixing plate (1311) and a rear side edge fixing plate (1321) are embedded in the side edges, the front side edge fixing plate (1311) has the same size as the rear side edge fixing plate (1321), and the tread (2) is placed on the tread beam (14);

• the starting edge (11), the side edge (13), the tread edge (12), the side edge (13) and the back plate edge (15) are connected in sequence and creases (133) are arranged at the connections, the crease (133) is arranged in the middle of the side edge and positioned between the front side edge fixing plate (1311) and the rear side edge fixing plate (1312), and the side edge (13) is divided into a front side edge (131) and a rear side edge (132) by the crease (133).