Welding robot for pile splicing of prefabricated pile

The invention discloses a welding robot for pile splicing of a prefabricated pile. The welding robot comprises a movable trolley with four rubber wheels at the bottom, wherein a tray is arranged on aframe chassis of the movable trolley; a circular track is arranged on the upper plane of the tray; a welding trolley is arranged on the circular track on the upper plane of the tray; a welding manipulator is connected into the circular track in a sliding mode through the welding trolley; the welding manipulator and the welding trolley are both in control connection with a controller; the tray is of a hollow structure; and the hollow structure of the tray surrounds the periphery of a welding groove in the butt joint position of the outer edge of an end plate or a hoop of the prefabricated pileduring pile splicing of the prefabricated pile. The welding robot effectively avoids the defects that for the welding groove in the outer edge of the end plate for pile splicing of the prefabricated pile, the welding labor int