The utility model discloses a conveying system for floating dregs in front of a trash rack at a water inlet of a power station, which is a floating dreg processing system arranged on a hydropower station dam body. The conveying system comprises an intercepting and grabbing part and a conveying part, wherein the intercepting and grabbing part comprises a plurality of gate piers on the upstream side of the hydropower station dam body, gate slot groups are arranged among the plurality of gate piers, a water inlet hole is formed in an upstream direction of the gate slot groups, double-rail type portal crane rails are also arranged on the gate piers, gate-type cleaning machines are arranged on the portal crane rails, and gate-type cleaning machine grab buckets are connected to the gate-type cleaning machines through mechanical arms; the conveying part comprises a main viaduct type adhesive tape machine on the upstream side of the hydropower station dam body, the main adhesive tape machine is supported by shape steel beams on the lower ends of both sides, the shape steel beams are arranged on cantilever brackets below, the cantilever brackets are fixed on the dam body through post-installed chemical anchor bolts, due to the viaduct type design of the main adhesive tape machine, the limited space of the original dam body is not occupied, the main adhesive tape machine is especially suitable for construction in a built-up hydropower station, and the floating dreg conveying capability is obviously increased by continuous carrying.