席草在编织加工前必须进行选草、分级、整理、染色等处理,以达到分级配料、优席优草,提高经济效益。一、选草、分级目前国内席草分级,本地草一般都采用以长度为主、兼顾色泽、匀度、韧性等综合因素进行分级。优质草要求:草茎长、枯尖少、利用率高;色青绿、光泽好、粗细均匀;老、嫩适中、茎壁柔韧;无病斑、无虫咬,富弹性。按长度分为六级:一级草长107厘米以上,二级草长100～107厘米,三级草长94～100厘米,四级草长87～94厘米,五级草长 Grass mat in the weaving process must be carried out before the election grass, grading, finishing, dyeing and other treatment, in order to achieve graded ingredients, Yau Yau grass, improve economic efficiency. First, the election of grass, grading At present, domestic grass grading, the local grass are generally used to length, taking into account the color, formation, toughness and other comprehensive factors for grading. Grass quality requirements: Grass stems long, withered less, high utilization rate; color green green, good gloss, uniform thickness; old, tender moderate, stem flexible; no spots, no bites, flexible. According to the length is divided into six levels: a grass longer than 107 cm, two grass 100 to 107 cm, three grass 94 to 100 cm, four grass 87 to 94 cm long, five grass long