Direct spread communication interference suppression technology plays an important role in the performance of communication system, but there is a problem of poor communication quality effect. The traditional ATF algorithm cannot solve the problem of direct expansion communication interference suppression in the performance of the communication system, and the suppression effect is not ideal. Therefore, a direct spread communication interference suppression technology based on the improved ATF algorithm is proposed, and the communication interference suppression technology is analyzed. Firstly, the adaptive filtering theory is used to locate the influencing factors, and the indicators is divided according to the requirements of the direct spread communication interference suppression technology to reduce the interference factors in the direct communication interference suppression technology. Then, the adaptive filtering theory is used to form an improved direct communication interference suppression scheme based on ATF algorithm, and the results of direct spread communication interference suppression technology is comprehensively analyzed. The MATLAB simulation results show that under certain evaluation criteria, the improved ATF-based algorithm is superior to the traditional ATF algorithm in terms of the accuracy of direct spread communication interference suppression technology and the time of influencing factors of direct spread communication interference suppression technology.