Abstract: Brick is one of the coarse aggregate of recycled concrete; its content will probably effect the working performance of the concrete mixture. Therefore, the effect law can be known by the measure of brick pore feature, rheological parameters of cement pastes with different bricks content and the suction and drainage behavior of bricks in cement pastes with different water cement ratio. The results showed that, the unique pore structure of the brick leads to no adsorption of cement particles, which can only be exchanged with water. With different water cement ratio, the water content of the brick will significantly affect its suction and drainage behavior. When the water cement ratio is 0.3 to 0.5, the equilibrium moisture content of the bricks is 9% to 17%. The higher the water cement ratio, the higher equilibrium moisture content of bricks, which shows that, when prepare low strength concrete, pre-full-water treatment can be carried out on the recycled aggregate. When the content below 10%, bricks with full water have no effect on the mobility of the cement paste.