Direct sequence spread spectrum (DSSS) technique has been widely used in both military communications and commercial communications. The normal jamming types, including broadband noise, partial-band noise and so on, are ineffective at the current jamming power level when the processing gain is large enough. This paper proposes a design of the repeater jamming based on radio frequency memory (RFM). The interference effect of repeater jamming on victim receiver's code acquisition is discussed, and the bit error probability of the DSSS system interfered by repeater jamming is obtained. Moreover, geometric limitation on repeater jamming is mentioned. The result of simulation shows the deduction is right. The repeater jamming proposed in this paper is a kind of correlative jamming types which are more effective than normal jamming types, and it can be used in the field of DSSS communication countermeasures.