The invention discloses an LVC (Live-Virtual-Construct) damage or interference simulation method and system based on a damage field or an interference field. The method comprises the following steps:firstly, defining a damage field region or an inference field region in a space three-dimensional coordinate system, wherein any space coordinate system enveloped in the closed space has a determineddamage field value or an interference field value to be used for representing damage strength or interference strength; then setting corresponding protective capability value or anti-interference value according to different postures of a simulation entity; and reading the damage field value or interference field valve corresponding to the space position of the simulation entity at set simulationmoment according to the space three-dimensional coordinate position of the simulation entity, and carrying out damage or interference calculation according to the protective capability value or anti-interference value corresponding to the simulation entity, thus completing damage or interference judgment. The complexity of damage or interference calculation in distributed type LVC simulation is reduced to O(n) from O(n<2>), so that communication load can be remarkably reduced, the instantaneity is promoted, and the consistency of damage or interference calculation can be promoted.