Five models designed included 0,1/4,1/2,3/4 and 1 0 of reed remaining density in the crab raising pool surrounded by windbreak.The survey results showed that there were significant differences of illumination intensity,plant surface temperature and air temperature in the different height of windbreak.There also were significant differences of water surface temperature,wind speed and the content of dissolved oxygen in water in the crab raising pool.Windbreak and reed could regulate the environment conditio...