The invention discloses a counterfeiting-resisting low-overhead router marking generation method. The method comprises the following steps: a network router firstly realizes distribution of a shared key with a target end; then, the router creates a router first preset bit marking according to each piece of data stream information, and realizes sharing at the target end; when receiving a data packet of a data stream, the router calculates a router second preset bit marking which belongs to the data packet according to the first preset bit marking and data packet information, and embeds the second preset bit marking into the data packet together with an IP address; and the target end, after receiving the data packet, recalculates the second preset bit marking according to a first preset bit of the router and the data packet information, and compares with the second preset bit marking in the data packet, thereby achieving a verification function. The method disclosed by the invention has the following advantages: on the basis of resisting the router marking counterfeiting and reducing the router calculation overhead, the efficiency of a network is improved, the security of the network is enhanced, and the method has the characteristics of high flexibility and strong usability, etc.