The invention discloses a building paint 
powder batching and 
grinding device, which comprises a 
machine casing, a feeding funnel, a first driving motor, a screw rod, a sliding sleeve, a connecting rod, a 
grinding roller, a 
grinding table, a fixed 
sieve plate, a sliding rod, a second  
Drive motor and vibrating hammer, a windproof device is installed under the feed inlet, a sliding sleeve is installed on the thread of the screw rod, a grinding roller is installed on the other end of the connecting rod, and a fixed 
sieve plate is installed on the grinding table  , a sliding 
sieve plate is slidably installed on the sliding rod.  The installation of the windproof device can effectively prevent the wind from blowing up inside the casing, and prevent the architectural 
coating powder inside the casing from going up and back; through the cooperation of the sliding sleeve and the screw rod, the grinding roller can move back and forth to improve the grinding effect; at the same time, the sliding can be adjusted by sliding  The overlapping position of the sieve plate and the fixed sieve plate can adjust the actual sieve plate aperture of the fixed sieve plate, and the size of the ground 
powder can be adjusted at any time without changing the sieve plate to improve work efficiency.