Herein, foreign object detection in the intralipid solution has realized by the cross-correlation peak of chaotic laser. The foreign objects are put inside the intralipid solution. Chaotic laser with delta characteristics of autocorrelation function is used as the detection source and divided into two parts. The first part is used to illuminate the intralipid solution, wherein the detection signal is received and output by the photoelectric detector through the intralipid solution. The second part passes through the photoelectric detector as the reference signal. The reference signal is cross-correlated with the chaotic laser passing through the intralipid solution. The optical informations of the intralipid solution and its internal foreign objects are reflected by the cross-correlation peak of the chaotic laser. Results show that the correlation detection method of chaotic laser has a strong anti-interference.