The invention provides a method for regulating and controlling the temperature of a hot air starting end. The regulating and controlling method comprises the steps of acquiring the ventilation quantity Qm of a coal mill, the weight g1 of the hot air starting end and the weight g2 of a hot air terminal respectively, calculating the physical heat qag of hot air, the physical heat qla of the leaked cold air, the physical heat qs of the sealed air and the heat qmac generated by the coal mill during working respectively according to the Qm, g1 and g2, and taking the sum of the four as the input heat qin; determining the hot air terminal temperature t2 according to the type selection of a boiler combustion system, separately calculating the evaporation water consumption heat qev, the heating fuel consumption heat qf, the equipment heat dissipation loss heat qs and the exhaust hot air take-away heat qag according to the temperature t2, and taking the sum of the evaporation water consumption heat qev, the heating fuel consumption heat qf, the equipment heat dissipation loss heat qs and the exhaust hot air take-away heat qag as the output heat qout; and calculating the difference value delta of qin and qout, and taking the temperature corresponding to delta less than or equal to +/-1% as the temperature value of the hot air starting end. The hot air starting end temperature value obtained through the method can meet the boiler combustion and the direct blowing type pulverized coal drying output at the same time.