【Aim】Tetranychus evansi (Acari: Tetranychidae) are invasive mites. However, the potential harm caused to crops in China remains unknown. Evaluation of the adaptability of T. evansi to two common Solanaceae host plants, Solanum lycopersicum and S. nigrum, can provide a theoretical basis for the scientific control of T. evansi. 【Method】 The two-sex life table method was applied to evaluate the adaptability of T. evansi on tomato and black nightshade through investigating the related biological parameters at (25±1) ℃, (70±5) % RH and L∶D = 16 h∶8 h. 【Result】 The pre-adult period of T. evansi fed on S. lycopersicum was 14.41 d, which was significantly longer than that on S. nigrum (12.08 d, p<0.05). When fed S. lycopersicum or S. nigrum, adults of both populations survived for more than 20 days. The preoviposition period of T. evansi fed on S. lycopersicum and S. nigrum was 1.51 d and 1.43 d, respectively. The intrinsic rate of increase (r), finite rate of increase (λ), net reproductive rate (R₀), mean generation time (T) of T. evansi fed on S. lycopersicum was 0.17 d^-1, 1.18 d^-1, 37.17, and 21.85 d, respectively; while those of T. evansi fed on S. nigrum was 0.19 d^-1, 1.21 d^-1, 34.55, and 18.63 d, respectively. 【Conclusion】 The results showed that T. evansi was able to complete its life cycle on both tomato and black nightshade, and the adaptability of T. evansi to S. nigrum was higher than to S. lycopersicum. Thus, S. nigrum is more suitable than S. lycopersicum as a host plant for T. evansi after invasion.