The invention relates to a paper machine coating circulating hot air centrifugal fan control device. The device comprises an external power supply, a three-phase asynchronous motor, a single-phase air switch Q and a control module set; the three-phase asynchronous motor and the control module set are connected onto the external power supply; the control module set is provided with an input end; the input end of the control module set is connected onto the external power supply through the single-phase air switch Q; the control module set is provided with a thermal relay KH1 and a time relay KT1; the power-on time-relay disconnection contact KT1-1 of the time relay KT1 is connected in parallel with the normally closed contact KH1-1 of the thermal relay KH1 of a motor control loop; an operation protection effect can be provided for the operating motor through the protection value of the overload thermal relay KH1; and therefore, after the surface of paper is coated, a coating circulating hot air centrifugal fan can be put into operation timely and perform drying by using hot air, and thus, defects such as the degradation of the quality of the paper which is caused by influence on the quality of the surface of the paper which is further caused by a condition that a fan cannot be put into use timely can be eliminated, the burnout of the motor due to repeated startup in a short time can be avoided, and the normal production of a paper machine can be ensured.