The invention relates to a visible light safety communication method based on an artificial interference technology, a system comprises an information sender, a legal receiver and a plurality of illegal eavesdroppers, and the plurality of eavesdroppers do not interact with one another. When the sender normally communicates with the legal receiver, an eavesdropper monitors and acquires informationin a channel. Under the condition that the position information and the number information of eavesdroppers are unknown, the system can still meet the requirement of safety communication by adjustingthe number of the light sources or the power ratio of the effective information to the artificial interference information. According to the method, the secrecy rate based on the system model is calculated, and the power ratio of effective information to interference information in the input signal can be flexibly selected according to the required security level. And meanwhile, the confidentiality of the system can be improved by increasing the number of the light sources.