Drilling assembly, drilling platform and underground water pollution prevention drilling equipment

The invention discloses a drilling assembly, a drilling platform and underground water pollution prevention drilling equipment. The drilling assembly comprises an outer barrel; a balance mechanism is mounted in the outer barrel, and a water taking and purifying assembly is further mounted in the balance mechanism; the water taking and purifying assembly is fixedly mounted at the top of an inner cavity of the outer cylinder; a drilling part is rotationally connected to the bottom of the outer barrel, and a drilling driving mechanism is mounted in the drilling part; a communicating flow channel is formed in the side wall of the outer barrel, and a plugging assembly is arranged in the communicating flow channel. The height positions of the adjusting assembly and the moving platform are adjusted in a matched mode through the lead screw motor on the outer support, so that the drilling part drills inwards along the middle of the outer support, the inner barrel is arranged in the outer barrel for vibration adjustmen