Aiming at the characteristics of weapon guidance data link coding, link building and image layer, this paper proposes the code-based weapon guidance data link pulse jamming technology and the protocol key smart jamming. Firstly, based on the error correcting ability of the weapon guidance data link, the pulse jamming waveform is optimized. Then according to the characteristics of link building of weapon guidance data link two techniques of synchronous sequence precise jamming and synchronous deception jamming are proposed. Finally, based on the analysis of the image message format of the reverse link of the weapon guidance data link, a smart jamming technique for the image frame head is proposed. The simulation results show that the smart jamming technology for the guidance data link of the weapon can concentrate the jamming power and realize the fatal strike to the weak link of the link.