This paper analyzed and compared three leveling and alignment methods for inserted angle-steel with an emphasis on suspension type. The polar coordinate method and simplified method were proposed for calculating the size of suspended angle-steel with reserved height, based on the calculation model of suspended angle-steel without reserved height and the rotating principle of foundation center. The operation steps, notices and engineering calculation examples of suspension method for inserted angle-steel were introduced. This method has the characteristics of simple operation, satisfied quality and high efficiency, which can be popularly applied in the construction of transmission line tower foundation.