在假定带电粒子为规范几何体模型的前提下，根据电流强度的微观定义和全电流定律以及毕奥-萨伐尔定律等推理出一个带电粒子运动产生的徙动电流、位移电流和磁感应强度的表达式.进一步计算真空中并驾齐驱的两个带电粒子之间的电场力和磁场力，给出电场力和磁场力的速度约束关系和速度量值判据，并跟考虑相对论效应得出的相关结果比较其一致性.指出只有带电粒子运动速度接近光速的条件下，磁场力跟电场力才有可比性.

 Charged particles are assumed to be a standard geometric model, an expression for the migration current, displacement current, and magnetic induction intensity generated by the motion of charged particles is inferred based on the microscopic definition of current intensity, the law of total current, and the Biot Savart law. Further calculate the electric and magnetic field forces between two charged particles running parallel in vacuum, provide the velocity constraint relationship and velocity magnitude criterion for the electric and magnetic field forces, and compare their consistency with the relevant results obtained by considering relativistic effects. It is pointed out that only when the speed of charged particles is close to the speed of light, can magnetic field forces and electric field forces be comparable.