Anti-jamming performance of a chaotic lidar is investigated experimentally and numerically. Using our chaotic correlation range-finder prototype, the anti-jamming capabilities of the chaotic lidar to different undesired signals are studied. Experimental and numerical simulation results indicate that the chaotic lidar, which takes no anti-jamming measure, possesses natural anti-jamming ability and larger noise tolerance to the disturbance from the chaotic laser, continuous-wave modulation laser and pulse laser signals. The feasibility of improving the anti-jamming performance of the chaotic lidar by using an average algorithm is analyzed.