Abstract: The deep space exploring spacecraft can be affected by the dust particles which will impact the spacecraft and accumulate in it,and this process will change the performance of the spacecraft.Space dust detector can be applied to detect the mass,velocity,trajectory,flux,chemical ingredient and isotope,and charge of the dust particle.In this paper we designed the main configuration of the space dust detector,simulated and calculated the ion trajectories affected by the parabolic grids in the reflector with software,and validated the feasibility to analyze the chemical ingredient with the reflector mass spectrograph.As the development of our country′s deep space exploration,the data of space dust detector will be useful for protection of spacecraft and science research in the future.