PROBLEM TO BE SOLVED: To provide a method for changing the "T+D nuclear fusion reaction" to "D+D nuclear fusion reaction" and generating nuclear fusion reaction by a collision type nuclear fusion reactor (a pulse nuclear fusion furnace) for clean power without using tritium as fuel gas since although an ion beam head-on collision type nuclear fusion reactor using a linear accelerator was proposed in 2004, examination on pulse operation and coulomb repulsion was inadequate, and although the advanced type thereof was proposed in 2010, the description is indistinct and now "T+D nuclear fusion reaction" is used.SOLUTION: Gas to be used is restricted to deuterium gas. Used is a synchronizing system for intersecting and colliding pulse neutral particle beams emitted from a pulse field accelerator (a set) at the center point of a spherical nuclear fusion furnace. The diameter of the spherical nuclear fusion furnace and the number of the pulse electric field accelerators (sets) are determined by an output to be set for power.