Abstract: Scattering characteristics of several common objects in battlefield were studied. Massive data of six types of object samples were obtained by experiments, and two bidirectional reflectance distribution function (BRDF) models were established by using the data. The unknown parameters in BRDF models were gained by genetic algorithm. The SSE and R-square indices were introduced to evaluate the adaptability of models. Results show that the five parameters semi-empirical model has better adaptability, which is fitted for the experiment data of the six-type plane samples.