Is there a tool in SolidWorks that can allow me to divide a line into equal parts? Thanks.

No ... but a line can be patterned, and the length and quantity can be can be controlled by an equation.

-or-

A set of Reference Points can be equally spaced along a line.

what i do is just put an equal relation on all my lines.

No ... but a line can be patterned, and the length and quantity can be can be controlled by an equation.

-or-

A set of Reference Points can be equally spaced along a line.