Compass capable of reading

The utility model discloses a novel compass which can be modified based on a conventional vernier caliper and realizes accurate reading by means of the existing readings on the vernier caliper. The compass capable of reading includes a main ruler and a vernier frame, the vernier frame is jointed on the main ruler to slide back and forth, and a vernier device is arranged on the vernier frame. The compass is characterized in that a movable scriber is fixed at one end of the main ruler, a movable pin is connected to the lower part of the vernier frame, and a center scriber is fixed on the movable pin. One end of the main ruler is further provided with a pressure plate and a guide frame, one side of the guide frame is provided with a hole, a fastener is arranged in the hole, and the fastener abuts against the pressure plate to fix the movable scriber at one end of the vernier caliper, a hole is arranged in the side surface of the movable pin, and a fastener is arranged in the hole of the movable pin to fix the ce