Under the background of domestic scientific instruments, in order to change the situation that the optically detected magnetic?state?selection cesium atomic clock still depends on imported lasers, three domestic distributed?feedback laser (DFB?LD) tubes were applied to the optically detected magnetic?state?selection cesium atomic clock, and the heterodyne beat?note measurement were conducted. In addition, the differences between these lasers and TOPTICA Photonics DFB?LD were analyzed. The experiment results show that the linewidth of the domestic laser is 1.999 MHz ± 6 kHz, and its frequency stability is 1 × 10^-11@100 s; the domestic lasers can achieve the standard specification (1.45 × 10^-12@100 s) on the domestic cesium beam tube, which provides ideas and references for further improving the performance of domestic lasers. Narrowing the domestic laser linewidth will be required in the future to achieve higher specifications of the compact cesium beam clock.