Chemical raw material fine classification screening device

The utility model belongs to the technical field of chemical raw materials, particularly relates to a chemical raw material fine grading and screening device, and aims to solve the problems that an existing coarse screening device is directly inserted into a shell, is lack of positioning, can slide in the shell at will, and can vibrate, so that the coarse screening device resonates and moves in the shell, and the screening effect is poor. In order to solve the problems that chemical raw materials cannot be screened due to the fact that the chemical raw materials are even separated from a shell, and therefore the device is inconvenient to use, the following scheme is provided that the device comprises the shell, a screen is slidably connected to the inner side of the shell, and symmetrically-arranged fixing plates are fixedly installed on the front side of the shell; according to the screen, the handle is held on the screen and the sliding rod is pulled, the sliding rod can unlock the screen through the pressi