The invention relates to fire-resistant explosion-proof polyformaldehyde fibers (POM) for radial interconnecting hole type concrete. Each fiber of the fire-resistant explosion-proof polyformaldehyde fibers is provided with a plurality of parallel interconnecting holes, the number of the holes is 2 to 12; the total areas of the holes in each fiber accounts for 15% to 60% of the total sectional area of each fiber, and the space of adjacent holes accounts for 4% to 25% of the radius of each fiber. The fire-resistant explosion-proof polyformaldehyde fibers (POM) for the radial interconnecting hole type concrete can form excellent water vapor pressure release channels during fire, particularly during an early stage of the fire, so that the fire-resistant explosion-proof performance of fiber reinforced cement-based composite materials can be improved.