The practicability of modulating the change of grand surface illumination shined by the artificial light to jamming television-guided weapons was analyzed. First, the paper analyzed theoretically the impact on target radiation characteristics of artificial light; Second, the hardware-in-the-loop simulation system to test television-guided was built, and the edge evaluation principle and the ratio of related-maximum value evaluation principle for jamming effectiveness were constructed; Last, based on the hardware-in-the-loop simulation system, the test of jamming automatic gain control process and auto focusing process was done and assessed. The experimental results show that different ways of light modulation cause varying degrees of jamming to TV guidance.