In order to provide the anti-counterfeiting for brand authentication，a fragile watermark algorithm is designed and implemented based on the analysis of the process of cloth manufacturing.In this algorithm，a shortest watermark coding scheme is designed to maintain the temsility balance considering the watermark damage caused by cutting.Experiments show that watermark has no noticeable effect to the appearance，and it is useful for authentication.The method is an effective technical means to authenticate for jacquard brand which greatly increases the cost and difficulties to forge products.It is also an innovation of watermarking technique which can be used in non-digital media texture.