Each linetype is defined on two lines in a LIN file. The first line defines the linetype name and provides for an optional description.
*linetype-name [, description]
This line must begin with an asterisk and must be immediately followed by the linetype name. If the description is provided, it must be separated from the name by a comma and no longer than 47 characters. The description is not used by AutoCAD; it is intended to help you visualize the appearance of the linetype.
The second line is the code that describes the actual pattern.
alignment,patdesc-1,patdesc-2, ...
This line begins with the alignment code (currently only A is allowed), followed by a comma-delimited list of pattern descriptors (no spaces are allowed).
When you create a linetype, it is not loaded into your drawing automatically. Use the Load option of theLINETYPE command.
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*linetype-name [, description]
This line must begin with an asterisk and must be immediately followed by the linetype name. If the description is provided, it must be separated from the name by a comma and no longer than 47 characters. The description is not used by AutoCAD; it is intended to help you visualize the appearance of the linetype.
The second line is the code that describes the actual pattern.
alignment,patdesc-1,patdesc-2, ...
This line begins with the alignment code (currently only A is allowed), followed by a comma-delimited list of pattern descriptors (no spaces are allowed).
When you create a linetype, it is not loaded into your drawing automatically. Use the Load option of theLINETYPE command.
看一下CAD的HELP就可以自己编了
也可以用EXPRESSTOOLS里的工具制作mkltype做线型，