The invention discloses a thermal excitation device for infrared thermal imaging nondestructive detection on a concrete structure. The device comprises an infrared radiation device, a boiler cradle, a boiler cradle rotation device and a boiler cradle lifting device, wherein the infrared radiation device comprises a radiation device array consisting of a plurality of ceramic radiation devices and a temperature control device electrically connected with the radiation device array; the radiation device array is fixed on the boiler cradle which is made of smooth stainless steel, and is connected with a moving component of the boiler cradle lifting device by the boiler cradle rotation device. According to the invention, a thermal source used by the technique of infrared imaging nondestructive detection on concrete not only is small in spatial gradient, high in time gradient, high in heating efficiency, and high in heating temperature controllable precision, but also can move conveniently and can be regulated in height and angle.