Provided are a tool and method for catching cattle by catching a cattle horn. The tool comprises a telescopic rod piece and a steel wire rope. An annular supporting part and a fixing part are fixed at two ends of the telescopic rod piece respectively, the annular supporting part is an annular body with an opening and is provided with a second clamping groove, the telescopic rod piece is provided with first clamping grooves, the fixing part is a steel hoop and is provided with a steel wire collecting device, and strong magnets are embedded in the first clamping grooves and/or the second clamping groove. One end of the steel wire rope is collected in the steel wire collecting device, the other end of the steel wire rope is provided with a slipknot and clamped in the second clamping groove, and the middle of the steel wire rope is clamped in the first clamping grooves. The method for catching the cattle is further disclosed. The tool is used for catching the cattle, remote cattle catching can be achieved, the telescopic rod piece can generally be designed to be over 3 m, and the tool is very safe.