Roadbed ditch excavation forming machine

The invention discloses and provides a roadbed ditch excavation forming machine, which comprises a cabin body, a water tank, a water tank and a water tank, wherein a walking mechanism is arranged at the bottom of the cabin body; a mechanical arm and a cab are sequentially arranged at the top of the cabin body in the excavation direction of the roadbed ditch; one end of the mechanical arm is rotationally connected with the cabin body, and the other end of the mechanical arm is detachably connected with an excavating device; a feeding hopper is arranged at the end, close to the mechanical arm, of the cabin body, the feeding hopper communicates with the interior of the cabin body, a discharging opening is formed in one side of the cabin body, and a conveying device is arranged in the cabin body; and a slip form device is arranged at one end, far away from the mechanical arm, of the cabin body, and is used for performing concrete pouring in a roadbed ditch groove body formed by digging of the mechanical arm and t