The invention discloses a rotary type scanning device based on a linear array sensor. The device comprises a driving module, a rotation shaft, a fixing device and the linear array sensor; and output end of the driving module is connected with one end of the rotation shaft, the other end of the rotation shaft is connected with the fixing device, and the linear array sensor is fixedly arranged on the fixing device; by a constant speed, the driving module drives the rotation shaft to rotate, and further drives the fixing device to rotate, thus, the linear array sensor is driven to rotate at a fixed speed. With the rotary type scanning device based on the linear array sensor, a target can be scanned by the constant speed at one fixed point; a center line of the rotation shaft is vertical to arotation plane of the linear array sensor, resolution of a middle area of a formed image is high, and breadth of the scanned image is high.