The invention relates to an anti-falling article floating hoop, which is used for being connected with a casing pipe. The floating hoop comprises a first connector, a second connector and a protecting component, wherein the first connector is tubular; the second connector is embedded into the first connector and is connected with the first connector; a bearing block and a check valve arranged in the bearing block are arranged on the inner wall of the second connector; the check valve comprises a valve base, a spring and a valve ball; the protecting component is arranged at the flowing-in end of the check valve and comprises a cylindrical part and a flange part; one end of the cylindrical part is closed and the other end of the cylindrical part is opened towards the check valve; the flange part integrally radially extends from the opened end part of the cylindrical part; a radial through hole is formed in the cylindrical part. The anti-falling article floating hoop is simple in structure, easy to process, convenient to mount and convenient to implement, popularize and use, and a falling article can be effectively prevented from entering the check valve of the floating hoop, so that the using safety of the floating hoop is guaranteed.