length and the field strength formula of an infinitely long charged straight line，and adopting

the charge projection method，the surface charge distribution of a charged conductor of finite

width and infinite length has been deduced. According to the principle of electric

potential superposition，the electric potential integral formula is derived; using the relationship

between field strength and electric potential，the integral formula of the two components of

electric field strength is derived. The formula is dimensionless，and the values of the components

of electric potential and field strength are calculated through numerical integration. The

electric potential and field strength of the charged conductor sheet of finite width and infinite

length are shown in the picture，and the two-dimensional equipotential lines and electric

field lines are also drawn in the diagram，which fully shows the distribution law of field strength.