The invention provides a turret-style unreeling device and method. The turret-style unreeling device comprises a rack, a rotary disc and rotating arms, the rotary disc is rotatably arranged on the rack, two leading belt pass rollers are oppositely arranged on the rotary disc and located on the same diameter of the rotary disc, and four stations are included when the rotary disc rotates by one circle. The rotating arms are arranged on the inner side of the rotary disc, the oppositely-arranged rotating arms are provided with a first reeling shaft and a second reeling shaft which are used for being mounted on a material use reel and a material continuous use reel correspondingly, and the rotary disc rotates to drive the rotating arms to rotate. Through the turret-style unreeling device, smooth mounting of the material use reel and the material continuous use reel can be achieved, the material use reel and the material continuous use reel can conveniently and directly reach the corresponding belt connecting stations, and preparation is made for achieving the belt connecting work of a belt connecting device.