This study proposes a system for achieving dual-symbol communication using a dual-target X-ray source to improve X-ray communication efficiency. By adjusting the strength and direction of the magnetic field, the electrons can be controlled not to bombard, uniformly bombard, bombard the chromium target, or bombard the copper target and complete the experiment on dual-symbol communication signal modulation based on the magnetic-field modulation dual-target X-ray source. In the experiment, 200 datasets are obtained at a time interval of 10 s and a distance of 40 cm. Based on the experimental data, the symbol error rate is analyzed using a genetically optimized binary Poisson distribution model. The results show that when the signal attenuation value is lower than 400, the symbol error rate is lower than 10^-4. Under this condition, approximately 500 photons remain in each time slot of the detection end. The genetic optimization algorithm improves recognition accuracy. When the attenuation value exceeds 1000, the symbol error rate optimization amplitude is approximately 10^-1. Within the 10^-4 symbol error rate range, the optimization amplitude is approximately 10^-5. This study provides a direction for developing X-ray communication technology based on multitarget X-ray sources.