The invention relates to a rotary type roaster roasting structure which comprises a sheath, a rotary support, a rotary platform, a big rotary arm, a driving device, a safety device and a lifting power system which is composed of a winch and a pulley block and arranged on the big rotary arm. A burner nozzle is connected onto the sheath which is connected with the big rotary arm through the safety device, the big rotary arm is fixedly arranged on the rotary platform, and the lower portion of the rotary platform is connected with the rotary support and the driving device. The rotary type roaster roasting structure is simple in structure, the sheath is liftable, working efficiency is improved, and a roaster is designed into that the big rotary arm with the sheath can rotate for 360 degrees to realize vertical short-travel liftable performance of the sheath, so that under the prerequisite that roasting equipment and a tank are guaranteed to be free of damages, lifting out and in of the tank is realized safely and effectively, and effective implementation of roasting procedures is guaranteed.