Device for avoiding roller changing falling of acid-rolling intermediate roller

The utility model discloses a device for avoiding roller changing falling of an acid-rolling intermediate roller. The device comprises a base, a support plate and fasteners, wherein the base is used for making contact with a working roller, and the support plate is used for supporting the intermediate roller; the base is a semicircle plate with a downward opening; a plurality of threaded holes are symmetrically formed in the left and right ends of the base; during operation, the inner surface of the base is tightly abutted with the roller surface of the working roller; the fasteners extend into the threaded holes and are pressed against the roller surface of the working roller, so that the base is fixed on the roller surface of the working roller; the support plate is a semicircle plate with an upward opening; during operation, the inner surface of the support plate is tightly abutted with the roller surface of the intermediate roller; the top surface of the base is fixedly connected with the bottom surface o