The invention discloses a continuously powered asphalt mixing plant. The asphalt mixing plant comprises a mixing plant body, a main control module, a powder detection module, a first circuit breaker component connected with an external electric supply, an emergency power supply, and a second circuit breaker component connected with the emergency power supply, wherein the power detection module isused for detecting whether the external electric supply is abnormal or not; the main control module can be used for switching the external electric supply to supply powder for the mixing plant body orthe emergency power supply by controlling the first circuit breaker component and the second circuit breaker component. After the design is adopted, the impact, caused by the abnormal external electric supply power, on the mixing plant body can be effectively avoided, and the electric supply and the emergency power supply can be automatically switched for supplying power, so that the continuous operation of the mixing plant body is guaranteed, and when the electric supply is abnormal, the influence on the processing process of an asphalt material is prevented.