Lammpspr is a free software for preparing input files of Lammps. As is well known, the preparation process for running lammps tasks is quite challenging for new users due to the lack of build-in graphics interface in Lammps. Therefore, we developed this software to facilitate the use of Lammps. This software was written with Fortran 77. It acts as an interface between Lammps and the third-party softwares. The detailed usage can be found in the manual. Please download the manual, example and program files from the following links. If you have any problems or suggestions on this software, please contact us.