The China Spallation Neutron Source (CSNS), including 20 distinctive time-of-flight neutron scattering spectrometers, is a major scientific platform for China’s neutron scattering research and a national scientific device constructed during the 12th Five-Year Plan of China. The neutron chopper is a neutron optical component that regulates the beam current on the scale of time, thereby being an indispensable part in a neutron scattering spectrometer. Its main functions are selecting the desired neutron band range and improving the signal-to-noise ratio. The CSNS needs approximately 73 sets of neutron choppers, which would require regular operation and maintenance. In order to avoid the import restriction of such critical instrument and ensure the success of the Big Scientific Engineering Construction, the CSNS formed a team for neutron chopper development in 2007, which overcame various key technological difficulties, successfully developed bandwidth limited chopper, T0 chopper and Fermi chopper in time, and realized the domestic production of neutron choppers with independent intellectual property rights. 9 sets, 27 sets and 37 sets of these neutron choppers have been or will be applied in the CSNS’s Phase I Project, Cooperative Spectrometer Project, and the future Phase II Project, respectively. The independently developed neutron choppers provided an important guarantee for the smooth construction of the CSNS. Their use is not restricted to China spallation neutron source projects, but can be extended to synchrotron radiation light source (X-ray chopper) projects, high-speed rotation mechanical equipments and other fields.