Underground drencher for termite control

The utility model provides an underground drencher for termite prevention, which relates to the technical field of termite prevention and comprises a drencher body, a slot is arranged on the lower side of the drencher body, a sealing washer is connected to the inner wall of the slot, a blocking mechanism is mounted in the drencher body, the blocking mechanism comprises a hand wheel, and the hand wheel is connected with the slot. The hand wheel is located above the drencher body, the lower side of the hand wheel is connected with a threaded rod, the outer wall of the threaded rod is connected with a rotating block, the outer wall of the threaded rod is in threaded connection with a threaded sleeve, and the outer wall of the threaded sleeve is connected with an L-shaped inserting rod. The rotating hand wheel drives the threaded rod to rotate, the threaded rod rotates to drive the filter screen sleeve to move up and down on the outer wall of the threaded rod, when the threaded sleeve moves downwards until the L-