Pen with build-in compasses

The utility model relates to a pen with build-in compasses. The pen comprises a pen body (10), a cover plate (20) and compass arms (30). A long groove (101) is formed in a pen rod of the pen body (10), a ring of steps (102) is arranged at the periphery of the long groove (101), the cover plate (20) is embedded in the ring of steps (102), the compass arms (30) are located inside the long groove (101), a rotating shaft (301) penetrates through the tops of the compass arms (30), and the two ends of the rotating shaft (301) are inserted in the long groove (101). The pen is simple in structure and convenient to use. When the compasses are not required to be used at ordinary times, the cover plate is embedded in the steps, and the pen is the same as a common pen. When the compasses are used, the cover plate is taken down, the compass arms are exposed out, and the function of the compasses is used. Due to the design, the pen has two functions, and the functions of the pen are variable, and conveniences are brought f