The invention provides a controlled cooling method capable of preventing die steel plate scale from dropping. The controlled cooling method comprises the steps that for a steel plate with a thickness of 150-200 mm, automatic controlled cooling is carried out: a controlled cooling process parameter is set in a system, a controlled cooling picture is set to be in an automatic mode, the initial cooling temperature is controlled to be 1010-1030 DEG C, the cooling speed is 6.9-7.1 DEG/S, and the finish cooling temperature is 890-910 DEG C; and for a steel plate with a thickness larger than 200 mm, manual controlled cooling is carried out: the water feeding amount of a controlled cooling set is set in the system to be 280-320 L/(m<2>.min), the water discharging amount is 580-620 L/(m<2>.min), 1-10 water sets are arranged, the speed of a controlled cooling roll table is set to be 1.7-1.9 m/s, and the controlled cooling picture is set to be in a manual mode. According to the controlled cooling method capable of preventing the die steel plate scale from dropping, the problem that scale on the surface of die steel plates drops in the process during which the die steel plates are stacked after being subjected to hot straightening. Thus, steel plate surface quality is greatly improved, the contractual delivery rate is improved, and brand images of enterprises are improved.