The invention belongs to programmable component structure technology field, specially a local programmable logic array wiring resource structure and modeling method which supports the crutch line. The wiring resource structure of the invention includes: programmable interconnected line, uniform switch matrix, input and output multi path selector array and logic unit. It breaks the limit of level and uprightness interlinkage resource, introduces the concept of crutch line, makes the wiring path not pass the programmable switch, it gives attention to speed and agility. The description of wiring line resource, the interconnected line is distributed to the repeated unit then integral interconnected resource is described by describing an interconnected line resource in a repeated unit. This describing method is very flexible, the kind, amount, proportion of interconnected resource can be changed conveniently, and any switch array can be generated.