The invention discloses a drainage tube puncture guide device used in ventriculoperitoneal shunt. The drainage tube puncture guide device is of an irregular metal tubular structure as a whole and consists of an upper half tube and a lower half tube, wherein the upper half tube and the lower half tube take the shapes of half tubes and are combined together; the head part of the irregular metal tubular structure takes the shape of a bullet; the tail part of the irregular metal tubular structure is detachably connected with a handle; a middle cavity is formed to accommodate a silica gel drainage tube; when the handle is mounted, the upper half tube and the lower half tube are fixed as a whole to extrude the silica gel drainage tube; and when the handle is dismounted, the upper half tube can be separated from the lower half tube, and the silica gel drainage tube can be propped out automatically. The drainage tube puncture guide device needs no guidance of a laparoscope, is capable of completing catheterization operation without multiple holes in an abdominal wall, is capable of reducing traumas, is simple to operate and is convenient and safe.