In this paper， Se microrods were synthesized using a physical vapor deposition method， and a metal-semiconductor-metal （MSM） photodetector was fabricated by using silver paste as the electrode. This photodetector exhibits a fast response time （T_r = 41 ms， T_d = 46 ms）， excellent responsivity （18.32 mA/W）， and detectivity （1.65×10⁸ Jones） at 3 V bias and under 450 nm light illumination. Spectral measurements demonstrate that the device has a broadband detection range from visible to near infrared range （450~1 550 nm）. Additionally， the device can also perform self-powered detection without bias. This research will further improve the application and development of Se in broadband photodetection.