Nanostructures stripe deposition technique is a new method to develop nanostructures length standard transmission with the near resonance laser standing wave field manipulation in neutral atoms. In the process of focusing atoms, due to the presence of deposition substrate, a straight edge diffraction phenomenon occurs in the laser standing wave field, which affects the atomic trajectory and deposition grating. The model of laser standing wave field is established under the straight edge diffraction disturbance, and the three-dimensional trajectory and deposition characteristics of chromium atoms are simulated using the Runge-Kutta method. Considering the influence of laser power and detuning amount, we analyze the trajectory and deposition characteristics of chromium atoms from the full width at half maximum (FWHM) and the contrast. The results show that when the laser power and the detuning amount are 3.93 mW and 200 MHz, the FWHM and contrast of atomic deposition grating are 6.043 nm and 0.863, respectively. Under this condition, the best quality of atomic sedimentary grating can be acquired. Compared with the classical model, this model has considered the influence of standing wave field of straight edge diffraction disturbance, the simulation results are closer to the actual situation and can be theoretical guidance to the experiment.