Method of prolonging guide wheel of rope saw

The invention discloses a method of prolonging the life of a guide wheel of a rope saw. The method comprises the steps of designing a rotational structure of the guide wheel and assembling the rotational structure of the guide wheel, wherein in the step of designing the rotational structure, the guide wheel is arranged on a wheel shaft through a bearing mechanism which comprises a front rotator, a rear rotator, an inner ring, an outer ring and an shaft seat, the front rotator and the rear rotator each comprise steel balls peripherally and uniformly distributed through a retainer, the inner ring is axially limited at the front part of the shaft seat, the outer ring sleeves the shaft seat, the steel balls of the front rotator are arranged in a roller path formed between the outer ring and the inner ring, the steel balls of the rear rotator are arranged in a roller path formed between the outer ring and the shaft seat, a sealing device for protecting the front rotator is arranged between the outer ring and the i