Tilting truck bed and dump truck

Disclosed is a tilting truck bed, comprising: a bed body (100) for carrying materials, wherein the bed body (100) comprises a bottom plate I (6), and a front plate (2), a tail board (8), a left side plate (10) and a right side plate (3) welded to upper edges of the bottom plate I; lifting supports (18), symmetrically mounted on the tail board, and used for being articulated to a truck frame (200) to realize the tilting of the bed body; shock absorber supports (300), symmetrically mounted on two sides of the front of the bottom plate I, with each shock absorber support (300) comprising a shock absorber support body and a clearance adjusting device, and the clearance between same and the truck frame (200) being adjusted by the clearance adjusting device, thereby effectively controlling the lateral displacement of the truck bed during the driving of the truck and having a lateral limiting function; and damping pad assemblies (400) installed on the shock absorber supports (300) to reduce the impact of the falling of the truck bed on the truck frame.