Abstract: The dust sources in the process of plastic production, the characteristics of producing dust and the law of dust dispersion were analyzed in this paper. A dust removal system suitable for field production line was designed according to the site condition of plastic production workshop. Based on the calculation results of ventilation resistance and air volume, the dust hood suitable for the operation of workers was designed, and a high air volume fan and efficient wet dust collector were selected. As the dust removal system run, the total dust concentration in the plastic production workshop was reduced to less than 3 mg/m³, the dust removal efficiency was as high as 98%, the dust removal effect was great.