The invention relates to a combustor capable of combusting stably, and belongs to the technical field of combustion equipment. In order to solve the problems that an existing direct-current combustoris narrow in load adjusting range and weak in concentration capacity, the invention provides a low-load combustor capable of combusting stably. The low-load combustor capable of combusting stably comprises a pulverized coal nozzle body, a light-phase pulverized coal nozzle, a peripheral air nozzle, a concentrated-phase pulverized coal pipeline, a supporting plate, a Venturi concentrator, a flame stabilizer and a light-phase flow disturbing device, wherein the pulverized coal nozzle body is connected with the light-phase pulverized coal nozzle, the peripheral air nozzle, the light-phase pulverized coal nozzle, the concentrated-phase pulverized coal pipeline and the flame stabilizer are sequentially nested from outside to inside, the Venturi concentrator is arranged on the inner wall of thepulverized coal nozzle body, and the light-phase flow disturbing device is annularly arranged between the concentrated-phase pulverized coal pipeline and the light-phase pulverized coal nozzle. According to the low-load combustor capable of combusting stably, pulverized coal airflow entering the combustor is concentrated through the Venturi concentrator, so that concentrated and light pulverized coal airflow with a concentrated center and a light periphery is formed, and the effects of ignition and stable combustion are achieved.