Abstract: In order to improve the quality control precision of primary processing, SPC was applied in quality evaluation of tobacco processing line in accordance with the new industrial standard, The Norm of Cigarette Technology (new edition).By the establishment of a Process Quality Monitoring System, technical parameters, standard technological conditions on the basis of statistical methods and coupled with relative technical management measures, the process capability levels were improved, the percentage of real process capability index (Cpk) values, whose 22 major quality characteristic values were above 1.0, increased from 50% to 86.4%.The transformation from result control and manual control to process control and automatic control were preliminarily achieved.