The utility model discloses a spool for a valve of a low-pressure natural gas well. The spool comprises a cage, a stem and a seat provided with a natural gas inlet. The cage and the seat are in hard-seal fit, the stem is arranged in the cage, the gap between the outer wall of the stem and the inner wall of the cage ranges from 0.6mm to 0.75mm, and apertures for outflow of natural gas are formed in the side wall of the cage. Since the cage and the seat are sealed and the gap between the stem and the cage is reasonable in arrangement, the collision is less prone to occurrence between the stem and the cage within the gap, jamming can be avoided, service life is prolonged and maintenance becomes convenient.