Abstract: Neutron scattering has been widely used in condensed matter research and applications in many industrial areas, as it is an ideal tool for investigating the microscopic structure and dynamics of materials. Spallation neutron sources are a new generation of pulsed neutron sources based on the proton accelerator, and can provide high-flux pulsed neutron beams for neutron scattering. This paper will focus on the basic structure and design of the target station and neutron instruments of the Chinese spallation neutron source project (CSNS).