There is non-zero bias for the receiver due to the anti-jamming filter in non-ideal channel. Furthermore, since the tap weights of the adaptive transversal filter varies based on jamming pattern, the bias will also vary. This problem of code tracking bias has been a significant hurdle to achieving interference suppression capabilities in precision global navigation satellite system applications. Aiming at this problem, using the symmetrical characteristic of non-ideal analog receiver channel, a new technique called zero bias anti-jamming filter was presented. The proposed method could be easy implement in engineering. Theoretical analysis and simulative results show that the proposed method is capable of reducing the bias to less than 0.2 ns, which is significantly smaller than the traditional adaptive anti-jamming filter.