投标保证金在招标投标活动中,是投标人随投标文件一同递交给招标人的一定形式、一定金额的投标责任担保。因此,投标保证金能够对投标人的投标行为产生约束作用,这也是投标保证金最基本的功能。我国法律和行政法规中都没有提到投标保证金的概念,也就是说投标保证金并非是在工程招投标中必须存在的内容。在我国的法律制度中,投标保证金在业主招标中作为选择项出现的,仅仅在工程施工招标中 Bid bond in the bidding activities, the bidder with the bidding documents submitted to the bidder some form of a certain amount of bid liability guarantee. Therefore, bid bond can have a binding effect on the bidding behavior of bidders, which is also the most basic function of bid bond. China’s laws and administrative regulations are not mentioned in the concept of bid bond, that is not the bid bond in the project bidding must exist. In our country’s legal system, the bid bond appears as an option in the bidding of the owner, and only in the tender of the project construction