Abstract: It is difficult for students to master the adjustment skills of spectrometer in the university physics experiment, which leading to spend too much time in the actual adjustment process. Based on the analysis on the adjustment skills, some simple instrument modifications are put forward, that is adding some auxiliary devices. Through the installation of two filaments in the telescope barrel, the line of two filaments can be seen as a datum line of telescope barrel. This can make it easier for students to master the adjusting skills of the spectrometer, so the students can complete spectrometer adjusting more quickly.