A screening anti-blocking conveying device comprises a rack and a vibrating screen. The left side and the right side of the vibrating screen are arranged on the rack through swing arms respectively, a driving motor is arranged on the lower portion of the vibrating screen, a material conveying mechanism located below the vibrating screen is arranged on the rack, a hair brush for cleaning a screen net of the vibrating screen is arranged on the material conveying mechanism, the material conveying mechanism is a belt conveyer, two guide grooves of which the direction is consistent with the direction for conveying materials are formed in the rack, guide rails or guide wheels which move along the guide grooves are arranged on the two sides of the belt conveyer respectively, and fixing parts for limiting the positions of the guide rails or the guide wheels are arranged on the guide grooves. The screening anti-blocking conveying device is reasonable in design and simple in structure. The mode that screening and conveying of a traditional vibrating screen are integrated is changed, the defect that net holes are blocked is overcome, and screening efficiency is improved. Due to the fact that a split type structure is adopted for the vibrating screen and the belt conveyer, repairing and maintenance are facilitated.