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As the existing RGB target tracking algorithms are difficult to cope with the problem of illumination changing and target occlusion effectively, we presents a sensing occlusion correlation particle filter target tracking based on three dimensional array laser imaging system. Firstly, the target occlusion judging mechanism based on depth information and HOG feature is proposed. Then the correlation maximum likelihood estimation particle filter algorithm is used to form the target prediction-tracking- calibration-redetection tracking mechanism. The experimental results show that the sensing occlusion correlation particle filter target tracking based on three dimensional array laser imaging system can well detect target occlusion and target tracking, reduce the impact of illumination changing, and has less calculation in target prediction-tracking-calibration-redetection, has better real-time performance and accuracy up to 85.7%.