The resonance effect likely exhibited by some non-immunogenic micro-environmental factors and its influence on tumor growth system modeled by correlated additive and multiplicative white noises is investigated. An analytic expression for the steady state distribution of the tumor growth system is obtained via the Fokker-Planck equation. Numerical results revealed that the resonance effect likely exhibited by some surrounding non-immunogenic micro-environmental factors within the tumor site may be one of the factors responsible for the double-edge effect of tumor micro-environment of either promoting or antagonizing tumor growth