The safety analysis method of the transmission line to ground distance is the key to ensure the transmission safety technology and the stability of the surrounding environment. In order to enhance the safety analysis technology of the transmission line to ground distance, the company has designed an alarm system that uses laser radar. The point cloud information of the transmission line is extracted through the laser radar technology, and the line-to-ground distance research is carried out. At the same time, the powerful data mining technology is used to mine the high-gray features of the laser radar point cloud information of the transmission line, the obtained key point information of the safe distance from the transmission line to the ground is sorted, the radar point cloud information of the same wavelength on both sides of the radar is processed by feature matching, and the optimal safe distance from the transmission line to the ground is calculated by linear programming. The simulation results show that the accuracy of the calculation of the safe distance between the transmission line and the ground is very high by using this technique, which greatly enhances the stability of the transmission line.