The invention belongs to the technical field of three-stage roasting of tobacco leaves, and particularly relates to a bulk roasting method capable of reducing surface dusting and blackening of tobacco leaves of Yuyan #7 and application of the bulk roasting method. A heat pump bulk roasting room is used, and a method of eliminating moisture in time, carrying out moisture elimination and roasting at the same time, controlling wet balls and continuously eliminating moisture is adopted; therefore, the problems that moisture in the tobacco leaves of Yuyan #7 is difficult to eliminate, main veins are difficult to dry, surface dusting is easily caused during heating and the leaves are easy to blacken are effectively solved.