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第三代同步辐射光源X射线具有高亮度、光谱连续、宽频谱范围、高空间分辨率、高衬度分辨率等独特优越性,可实现光谱精准计算及能量可调,对低Z材料内部结构边缘增强图像方面也具有很强的优势.利用上海同步辐射光源X射线双能减影和相衬成像技术,实现铜唑防腐剂处理竹材的同步辐射无损检测研究,并获得了Cu的分布图和处理材的内部结构,该技术为防腐处理竹材解剖学研究提供了一个重要无损检测手段.“,”The third-generation synchrotron radiation X-ray has many advantages such as high brightness,continuous spectrum, wide spectral range,high spatial resolution and high resolution and so on,which helps to realize the adjustable energy and pre-cise calculation of its spectrum.And it also has the competitive advantage of obtaining the edge enhancement image for high con-trast imaging of low Z materials.In this paper,the Cu distribution was obtained by dual energy subtraction imaging and the characteristic microstructures of CuAz preservative treated bamboo were investigated systemically with XPCM at Shanghai Syn-chrotron Radiation Facility(SSRF).The results showed the testing techniques were expected to the important precision nonde-structive methods for preservative treated bamboo.