The invention belongs to the technical field of automatic feeding devices, and particularly relates to a temperature-detecting automatic coal feeding device. A coal outlet channel is obliquely arranged below a coal feeding channel of the device and is connected with the coal feeding channel; a baffle plate hinge is arranged on the inner surface of the upper part in the middle of the coal outlet channel and is connected with a rotating baffle plate; the rotating baffle plate is provided with a sliding rail; a motor is arranged on the outer side of a partition plate on the upper layer of the coal outlet channel and is fixed on the outer surface of the partition plate on the upper layer of the coal outlet channel through a motor supporting piece connected with the motor; an ejector rod penetrates through the partition plate on the upper layer of the coal outlet channel, one end of the ejector rod is connected with the motor, and the other end of the ejector rod is slidably connected with the sliding rail on the rotating baffle plate through a slider; and a control device is arranged outside the temperature-detecting automatic coal feeding device, and is respectively connected with the motor and a temperature-detecting thermocouple positioned in a hearth. The temperature-detecting automatic coal feeding device is small in size, light in weight and convenient to use and operate, can be taken, placed and shifted randomly, and is low-carbon and environment-friendly; automatic coal feeding under temperature control is realized; and energy is saved.