介绍了一种以单片机为核心的瓦楞纸板生产线在线原纸张力测控装置，实践运行表明，它成功地解决了瓦楞纸板生产线长期没有解决的一个技术难题——断纸问题，既降低了生产成本，又减轻了工人的劳动强度，同时也提高了生产效率和产品质量。 This paper introduces an online raw paper tension measurement and control device of corrugated cardboard production line with SCM as its core. The practice shows that it successfully solved a longstanding problem that the corrugated paperboard production line has not solved - the problem of paper breakage, which not only reduces the production cost, Reduce the labor intensity of workers, but also improve the production efficiency and product quality.