Tellurian-shaped solid geometry teaching aid

The utility model discloses a terrestrial globe shape solid geometric teaching instrument, comprising a frame and a connecting part. The teaching instrument is characterized in that the frame is formed by the cross-connection of three circles with equal radius; wherein, a circle (1) is respectively articulated with a circle (8) and a circle (9) on four quartiles (2) thereof; a movable clamp ring (5) is arranged at the intersection of the circle (8) and the circle (9); and the circular diameters of all the circles are respectively provided with circular holes (3) and a connecting part (4) is connected with the corresponding circular hole (3). The utility model has simple structure and strong operability, can demonstrate inscribed geometry of various spheres and hemispheres, also can demonstrate the change of more complex geometric figures, is convenient to teaching for teachers, can show three-dimensional space visually and is beneficial to strengthen three-dimensional imagination.