Crushing and screening device for preparing microcapsule powder

The crushing and screening device comprises a box body, a crushing chamber, a screening chamber and a conveying chamber are sequentially arranged in the box body from top to bottom, a feeding port is formed in the top of the box body, and a discharging pipe with a valve is arranged on the right side of the bottom of the box body; a first-stage blanking plate is arranged at the bottom of the crushing chamber, and a second-stage blanking plate is arranged in the screening chamber; a crushing roller is arranged in the crushing chamber, a screening barrel is arranged in the screening chamber, and a spiral conveying unit is arranged in the conveying chamber; a mounting base fixed to the interior of the box body is arranged on the right side of the screening barrel, and the top of the mounting base communicates with the discharging position of the tail end of the first-stage discharging plate through a conveying pipe. The crushing roller, the screening barrel and the spiral conveying unit are correspondingly arrang