In this paper, the one-dimensional time-dependent Schrdinger equation is numerically solved; in muon-catalysed fusion, the influence of different laser inte nsities and wavelengths on the μ3He ionization is studied. Resul ts show t hat the ionization probability is about 2.7 percent when the magnitude of laser intensity is from 1019 to 1023W/cm2, an d can increase obviously wh en the laser intensity reaches 3.0×1024 W/cm2. Furthe rmore, the ionizat ion probability increases with the laser intensity and wavelength, that is, to e nhance the efficiency of the muon-catalysed fusion.