The paper analyzes working principles,important technologies and categories of expanded anchor rod,studies anchor pulling-resistance computation formula,and finally explores experimental examination of anchor rod pulling-resistance,with a view to play certain promotion role in expanded anchor rod application in underground engineering.%对扩大头锚杆工法的原理、重要工艺、类型进行了分析，研究了锚杆抗拔力的计算公式，并对锚杆抗拔力试验检测进行了探讨，以期对扩大头锚杆在地下工程抗浮的应用起到一定的推广作用。
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