Since the last decades, there have been numerous reports about the interaction of magnetic field (MF) and cold atmospheric plasma (CAP) with the biological systems, separately. In this manuscript, we have investigated the combined effect of CAP with the static magnetic field (SMF) as an effective method for cancer cells treatment. MDA-MB-231 breast cancer cells were cultured and treated with CAP in different input power and different exposure time in the presence and absence of the SMF. Vitamin C is used in medium, and cell viability is investigated in the presence and absence of this antioxidant compound. The MTT assay has been employed to measure cell survival, and then T-test and one-way ANOVA are used to assess the significance level of quantitative data. In order to determine the migration rate of cancer cells, wound healing assay has been carried out. Results show that presence of the SMF and vitamin C as well as increasing the input power has a significant role on the attenuation of the survival and migration rate of the cells. The results of the present investigation will greatly contribute to improve the CAP efficiency in cancer therapy through using the SMF and vitamin C as a complement to conventional CAP therapies.