圆锥曲线问题的深入研究,总是从它的图像或者轨迹方程入手,其过程完美地体现“有数无形难直观,有形无数难入微”的数形结合思想,因此,求出满足曲线条件的轨迹方程,显得至关重要.本文就双曲线的相交切线进行研究,进而得出一系列有趣的轨迹方程. The in-depth study of the conic curve problem always begins with its image or trajectory equations. The process perfectly embodies the “numerical intangible and difficult, intuitive, tangible and intangible” mathematical associative thinking. Therefore, the condition of satisfying the curve is obtained. The trajectory equation is very important. This paper studies the intersection tangent of the hyperbola, and then obtains a series of interesting trajectory equations.