The invention provides a 980nm dissipative soliton mode-locked laser, and relates to the technical field of laser, aiming at solving the problems that existing lasers are realized in a way of space coupling, so that a system is low in coupling efficiency and poor in stability. The 980nm dissipative soliton mode-locked laser comprises a wavelength division multiplexer, a gain fiber, an isolator, a coupling output element, a band-pass filter, a first polarization controller and a second polarization controller, wherein the wavelength division multiplexer, the gain fiber, the band-pass filter, the first polarization controller, the isolator, the second polarization controller are connected with the coupling output element in sequence of optical fiber, so that a full-optical fiber ring-shaped cavity is formed. After the 980nm dissipative soliton mode-locked laser is adopted, stable dissipative soliton mode-locked pulse output can be realized, the mode locking repeat frequency is 20.38MHz, the maximum output power is 26.1mW, a mode locking threshold value is 170mW, and the pulse width is 70-80ps; the 980nm dissipative soliton mode-locked laser not only can generate blue light of about 490nm by frequency multiplication, but also can serve as a light source with high brightness and long service life, and can be taken as a pumping source of an erbium-doped amplifier.