The utility model discloses a roller clamp capable of preventing mud. A roller frame comprises an upper supporting plate, a lower supporting plate and a connection body for connecting the upper supporting plate and the lower supporting plate, a gap for containing roller sleeves is reserved between the upper supporting plate and the lower supporting plate, two groups of installation holes are formed in the roller frame, and a roller shaft is arranged in each group of installation holes. A first bearing is arranged between the roller shafts and a first shaft hole, a second bearing is arranged between the roller shafts and a second shaft hole, the roller shafts between the upper supporting plate and the lower supporting plate are sleeved with the roller sleeves, the inner surfaces of the roller sleeves are fixed on the outer surfaces of the roller shafts through pressing plates, fasteners and inner and outer spline groups, and metal oil blocking rings are arranged on the lower surface of the first bearing and the upper surface of the second bearing. Compared with the prior art, by means of compact structural design and good sealing protection, mud cannot intrude into the roller clamp for a long time, and corrosion to the roller clamp is avoided.