Mutual interference between LiDARs is a critical problem that affects the safety of driverless cars. In this paper, a vehicle-mounted, light frequency-hopping (LFH) LiDAR system and its related ranging method are proposed. The anti-interference performance of the LFH LiDAR is analyzed under different interference conditions by simulations and experiments. The results show that the LFH LiDAR based on correlation detection can effectively resist the interference from the same type of LFH, pulse, frequency-modulated continuous wave, and continuous-wave LiDAR in different quantity and intensity cases. In the experiment involving different types of interferences, the relative error of the detection range is less than or equal to 1.5%. It indicates that the LFH LiDAR has reliable anti-interference performance.