The utility model discloses a cattle pen bringing convenience to safe cattle tying operation. According to the cattle pen safe in cattle tying operation, a rope which ties a cow head is tied to the outer side of a feeding trough through a rope penetrating hole in the lower portion of the feeding trough, operation personnel can be far away from the cow head, and the problem that a cow attacks the operation personnel is effectively avoided. A plurality of rope tying columns or rope tying rings are arranged at the top of the outer side of a long trough, a plurality of rope penetrating holes are formed in the lower portion of the long trough, one end openings of the rope penetrating holes are formed in one side of a manway, and the other end openings of the rope penetrating holes are formed in one side of a cattle bed. The space distance between the rope tying columns or the rope tying rings is the width needed for feeding a cow. The space distance between the rope penetrating holes is the width needed for feeding a cow. The cattle pen has the advantages that when the cow is tied to the cow bed of the cattle pen, operation is save, cattle tying rope paying off and taking up are safe, a person can walk safely in the manway, and the cow tied at the cattle bed and a cow tied with an existing cow tying method have the same activity space.