The invention discloses a water-cooled sand storage hopper mechanism which aims to solve the problem of high solidification possibility of inorganic sand in a sand storage hopper. The water-cooled sand storage hopper mechanism comprises a main body and is characterized in that a flow passage for enabling a coolant to circulate from a low position to a high position is formed inside the main body, an inlet of the flow passage is formed in the bottom of the flow passage, an outlet of the flow passage is formed in the top of the flow passage, the flow passage is uniformly distributed in the inner wall of the main body. The water-cooled sand storage hopper mechanism has the benefits that the effect that the environment temperature in the sand storage hopper is kept to be lower than a certain value is finally realized, and a sand core in the sand storage hopper is enabled not to be easily solidified to realize good fluidity.