The invention provides a method for quickly judging the rigidity and strength of pipeline in civil building. The method includes such steps as 1, making a table with column items contain nominal diameter, valve mass and maximum distance between lower supports and hangers arranged in middle of span, setting multiple reference values for each column item, setting the reference values for each columnitem, setting the reference values for each column item, setting the reference values for each column item, and setting the reference values for each column item. 2, selecting the reference value ofthe pipeline to be judged corresponding to the nominal diameter according to the nominal diameter in the first column of the table; 3, selecting the quality reference value of the corresponding valvepart of the pipeline to be judged according to the quality of the valve parts in the table; 4, according to the nominal diameter corresponding to the selected pipe and the reference value of the valvemass, the reference value of the maximum spacing of the lower support and hanger corresponding to the pipeline to be judged is found out in the table and compared with the known pipeline spacing value defined by the pipeline to be judged. If the known pipeline spacing value is smaller than the reference value of the maximum spacing of the lower support and hanger corresponding to the pipeline tobe judged in the table, the rigidity and strength of the pipeline to be judged are qualified. The present application can reduce the time required for pipeline stiffness strength qualification approximation and auxiliary judgment.