Universal pen compasses

Provided is a pair of universal pen compasses. The pair of the universal pen compasses at least comprises a twirling handle, a reversed U-shaped shaft connecting part, a rotation shaft leg, an arc drawing leg and a universal pen clamping groove. The twirling handle is arranged at the top end of the reversed U-shaped shaft connecting part. One end of the rotation shaft leg and one end of the arc drawing leg are hinged to the reversed U-shaped shaft connecting part. The other end of the rotation shaft leg is provided with a rotation needle. The universal pen clamping groove is arranged at the other end of the arc drawing leg. The universal pen clamping groove is a hollow polygon, and a drawing pen is clamped inside the universal pen clamping groove. A side wall of the universal pen clamping groove is provided with a screw type tightening part in a spiral mode. The left end of the hollow polygon of the universal pen clamping groove is a a ->-shaped pen clamp. The portion of the universal pen compasses for clamping the drawing pen is designed to the >-shaped pen clamp, the drawing pen is placed into the >-shaped pen clamp area, no matter whether the drawing pen is thick or thin, the universal pen compasses can achieve the clamping point of no less than one point two lines for the circumference of the drawing pen or enable the different heights of the circumference of the drawing pen to be clamped stably by five points simultaneously under the pushing effect of the tightening part on the right side of the greater-than-shaped pen clamp area.