The photoionization/photodissociation mechanism of allyl chloride was investigated with a 50 fs laser pulse at 200, 400 and 800 nm. With the ionization mass spectra and light intensity index recorded at three different wavelengths, the dependence of strength of the parent and fragment ions with the wavelength was analyzed. It was found that the parent ion (C3 H5 Cl + ) comes from directly non-resonance ionization with 200 nm femtosecond pulse, while the daughter ions are from dissociative ionization of C3 H5 Cl + . At 400 nm, some molecules are excited to the high Rydberg state and C3 H5 radicals are generated by direct dissociation. The enhancement of C3 H + 5 signal is observed since multi-photon ionization of C3 H5 increases the population of C3 H + 5. At 800 nm, nσ states and some Rydberg states are both populated. The further increased population of C3 H5 leads to an increase of C3 H + 5. The wavelength dependence of C3 H + 4 yield is less pronounced, since it comes from dissociative ionization of C3 H + 5 and C3 H5 Cl + .