The utility model provides a device for connecting truck cab rear fender's technical scheme, this scheme includes linking bridge assembly and lower linking bridge assembly, it is connected with rear fender's upper end to go up the one end of linking bridge assembly, the other end of going up the linking bridge assembly passes through driver's cabin rear overhang support and connected to the frame, the one end of linking bridge assembly is connected with rear fender's lower extreme down, the other end and the connected to the frame of lower linking bridge assembly. This kind of pipe linking bridge structure that adopts split type last linking bridge and time linking bridge has increased rear fender and the frame space between, the blast pipe of being convenient for, turns to arranging of tie rod. This structural performance is stable, can bear the high strength vibration, has avoided having improved rear fender connecting device's reliability because of the phenomenon that the fracture leads to rear fender to damage appears in long -term atress, has reduced manufacturing cost.