Angular trisection is one of the three major geometric problems in ancient Greece. Angle trisection is a famous problem in the drawing of geometric rulers in ancient Greece. The problem of turning a circle into a square and folding a cube is listed as one of the three difficult problems in ancient mathematics, but now it has been proved mathematically that there is no solution to this problem. The complete description of this problem is as follows: a given angle is divided into three parts, only a compass and an uncalibrated ruler. On the premise of ruler drawing (ruler drawing refers to drawing with ruler and compass out of proportion), there is no solution to this problem. If the conditions are relaxed, such as allowing a scale, or it can be used with other curves, then a given angle can be divided into three equal parts.