Abstract: Reference1proposes to use multiple valued switch-level algebra for the analysisand design of pass-transistor networks It is proved that this mathod is an effective methodIn this paper.some pass-trans(?)stor switch network CAD algorithms based on multiple-valuedswitch-level algebra are given These include an algorithm to derive a switch-level expression fromthe structure of a pass-transistor switch network,an algorithm to change a switch-level expressionto an equivalent Boolean expression and an algorithm to change Boolean expression to an equivalentswitch-level expression These algorithms can be used in the computer-aided design and analysis ofpass-transistor switch networks