狂草又名大草,是最为恣肆放纵的一种书体,为唐张旭所创。张旭狂草后传怀素,人称“张颠狂素”。后世宋黄庭坚、明祝允明、王觉斯亦多染于旭、素,并均有佳作传世。狂草之渊源,如果细细推究起来可以追溯到张芝及王献之。张芝为西域敦煌人,性格豪爽,为人卓尔不群,其草书亦风格雄健、迭宕不羁,清人《玉燕楼书法》中曰“张伯英芝益(章草)从而肆之,连环钩锁,神化无穷,谓之大草”。至王献之草书时代,则更是大胆破体、锐意变革,“大令用笔,外拓而开廓,故散朗而多姿”(元袁裒《书学纂要·总论书家》)。其收入米芾《宝晋斋帖》中的《十二月帖》,笔势连绵、逸气纵横。米南宫曾赞曰:“此帖运笔如火箸画灰,连属无 Crazy grass, also known as the big grass, is the most unbridled book of a body, founded by Tang Zhang Xu. Zhang Xu cursive after Huai Su, known as ”Zhang mad elements “. Later Song Huang Tingjian, Ming Zhu Yunming, Wang Yue Si also dyed Yu Xu, Su, and have a masterpiece handed down. The origin of mad grass, if you go through the thin can be traced back to Zhang Zhi and Wang Xianzhi. Zhang Zhi is the western region of Dunhuang people, generous personality, people are outstanding, the cursive style is also strong, Duanda unruly, Qing ”Yanyu floor calligraphy“ in the ”Zhang Boying Zhiyi (Zhangcao) thus wanton, chain hook, deification Infinite, that the big grass. To Wang Xianzhi cursive era, it is even more boldly broken bodies, determined to change, “Da-Ling pen, outside the extension and open profile, it is scattered and multi-post ” “). Its income rice 芾 ”Bao Jin Zhai Tie“ in the ”December“, gestures, Yi Qi aspect. Mi Nam Gong Zeng praise said: ”This post pen like a fire 箸 painted gray, even without