Roof waterproof engineering structure with good waterproof effect

The roof waterproof engineering structure is good in waterproof effect and comprises a middle installation box, a first flow guide plate, a second flow guide plate and a third flow guide plate, the first flow guide plate, the second flow guide plate and the third flow guide plate are symmetrically connected to the two sides of the middle installation box, the first flow guide plate is located above the second flow guide plate, and the third flow guide plate is located below the second flow guide plate. By means of the structural design of the first flow guide plate, the second flow guide plate and the third flow guide plate, rainwater falling on the roof can be divided and guided multiple times in the using process, then the standing time of the rainwater on the top of the roof is shortened, the rainwater flow in the unit area of the roof is reduced, and it is avoided that the rainwater is accumulated in situ for a long time to cause erosion; and by means of the structural design of the drying assembly, moist