The invention relates to the technical field of 
wine brewing equipment, and in particular discloses a material moistening device. The material moistening device comprises a grain weighing tank, a 
liquid storage tank, a grain moistening chamber and a material moistening tank, wherein a sliding plate is slidably connected in the grain weighing tank, the middle of the bottom wall of the grain weighing tank bulges, so that the lower part of the grain weighing tank is separated into communicating two chambers, a 
piston is in sliding connection in each chamber, a connecting rod is connected betweeneach 
piston and the sliding plate and a spring is connected between each 
piston and the bottom wall of the corresponding chamber, each piston and the corresponding chamber form a sealed cavity, grainfermenting water is accommodated in each sealed cavity, each sealed cavity communicates with a water inlet 
pipe and a water outlet 
pipe, the water outlet pipes communicate with the 
liquid storage tank, and a liquid conveying 
pipe communicates with the bottom of the 
liquid storage tank; and a controlled grain outlet is formed in the sliding plate, a telescopic material 
discharge pipe communicates at the grain outlet, the material 
discharge pipe communicates with the grain moistening chamber, a first screen and a plurality of spray nozzles connected with the liquid conveying pipe are mounted inthe grain moistening chamber, and a material conveying pipe communicates between the grain moistening chamber and the material moistening tank. With the material moistening device, uniform grain moistening can be carried out on the raw materials used for 
brewing wine, so that the grain moistening effect can be improved, and the device maintenance cost of enterprises is reduced.