The invention discloses a scraper conveying device, which comprises a left chain assembly and a right chain assembly, wherein a scraper is arranged between the left chain assembly and the right chain assembly; a transmission shaft is arranged on the front parts of the left chain assembly and the right chain assembly; chain wheels matched with the left chain assembly and the right chain assembly are arranged on the transmission shaft; a left driving motor and a right driving motor which are symmetrically arranged on a stander are arranged on two sides of each of the left chain assembly and the right chain assembly; speed reducers are connected to the output shafts of the driving motors, and are connected with the ends of the transmission shaft through bevel gear transmission mechanisms; a tightening shaft is arranged on the rear parts of the left chain assembly and the right chain assembly; two ends of the tightening shaft are connected with a tightening oil cylinder arranged on the stander; a left driven chain wheel and a right driven chain wheel which are matched with the left chain assembly and the right chain assembly are sleeved on the tightening shaft; shaft sleeves are arranged between the left driven chain wheel and the right driven chain wheel and on the tightening shaft on two sides of the left driven chain wheel and the right driven chain wheel; and adjusting and positioning screws are arranged between the shaft sleeves and the tightening shaft. The scraper conveying device has a large starting torque, high unloading speed and high work efficiency, runs stably, is quickly mounted and debugged, and is convenient to maintain and repair.