Weeding machine with cutter head convenient to replace

The utility model discloses a weeding machine convenient to replace a cutter head, which belongs to the technical field of weeding machines and comprises a control box, a driving motor is fixedly connected in the control box, a first hollow pipe is fixedly connected to one side of the control box, and a second hollow pipe and a connecting sleeve are slidably connected to the top of the first hollow pipe. The second hollow pipe is fixedly connected with the connecting sleeve, the surface of the connecting sleeve is in threaded connection with a fixing bolt, one side of the fixing bolt penetrates through the connecting sleeve and is fixedly connected with a semicircular clamping sleeve, and a first driving shaft is arranged in the first hollow pipe in a penetrating mode through a bearing; an output shaft of the driving motor penetrates through the control box and is fixedly connected with the first driving shaft; the semicircular clamping sleeve is loosened from the surface of the first hollow pipe through the