Cantilever crane of concrete pump truck and concrete pump truck

The utility model discloses a concrete pump truck arm support and a concrete pump truck, and relates to the technical field of concrete processing. Comprising a vehicle arm frame body, an adjusting mechanism is installed at the bottom end of the vehicle arm frame body, the adjusting mechanism comprises a bearing frame and a rotating motor, and the bearing frame is rotationally connected with the vehicle arm frame body; the two sides of one end of the bearing frame are fixedly connected with containing circular truncated cones correspondingly, and a rotating motor is fixed to the outer portion of one containing circular truncated cone. And the output end of the rotating motor is fixedly connected with a driving shaft, and one end of the driving shaft penetrates through the other placement circular table and is fixedly connected with a transmission wheel. The output end of the boom of the pump truck is used as an input piece, the storage roller is used as an output piece, and the material spraying hose is wound