Abstract: Dual-wavelength-pumped supercontiuum generation in an all-fiber device has been theoretically investigated. Firstly, a theoretical model of dual-wavelength-pumped experimental scheme in an all-fiber device was given. Secondly, by solving the generalized nonlinear Schrdinger equation with the adaptive split-step Fourier method, formation of dual-wavelength pump source and supercontinuum generation one after another were realized. The simulation results agree with the experimental observations very well and reveal that the conjugate action of soliton self-frequency shift and soliton trapping through cross-phase modulation can effectively extend the spectral range to the visible wave band. The research can provide theoretical supports in the realization and construction of dual-wavelength-pumped supercontinuum all-fiber device.