柏格理苗文，又称为滇东北老苗文、石门坎苗文、框式苗文，是由英国传教士柏格理发明的拼音文本，以记录苗语滇东北次方言。

1905年，英国卫理公会传教士柏格理在苗族教徒杨雅各、汉族教徒李司提反等协助下，在贵州威宁的石门坎地区创制了柏格理苗文。这套文本创制以后主要用于苗族基督教活动，曾出版过根据这一文本翻译的圣经、赞美诗等。使用地主要包括贵州的威宁、赫章、水城、紫云，云南的彝良、大关、永善、寻甸、楚雄等地。中华人民共和国成立后，于1956年对滇东北老苗文进行拉丁化改革，称为滇东北苗文（新苗文）。1982年，云南省还曾在柏格理苗文的基础上对其进行改进与规范，在楚雄、昆明、玉溪、**等地方推广。据1980年代的估计，在使用苗语滇东北次方言的约25万苗人中约有5万人能够熟悉掌握这套文本。2010年成立了石门坎苗文教育普及促进会。

The Pollard script, also known as Pollard Miao (Chinese: 柏格理苗文 Bó Gélǐ Miao-wen) or Miao, is an abugida loosely based on the Latin alphabet and invented by Methodist missionary Sam Pollard. Pollard invented the script for use with A-Hmao, one of several Miao languages. The script underwent a series of revisions until 1936, when a translation of the New Testament was published using it. The introduction of Christian materials in the script that Pollard invented caused a great impact among the Miao. Part of the reason was that they had a legend about how their ancestors had possessed a script but lost it. According to the legend, the script would be brought back some day. When the script was introduced, many Miao came from far away to see and learn it.