Based on the methods of value similarity and shape similarity, the consistency characteristics of the echo parameters of two strong convective cell pairs during a strong convective weather process caused by multiple convective monomers in Dalou Mountains in Guizhou Province on April 30, 2015 were analyzed and the time shift (phase shift) technology and mathematical statistical methods were used to analyze the similarity of the convective characteristic parameters of strong convective cell pairs. The results are as follows: (1) The value similarity of the maximum echo intensity Z_max, 0 dBZ height H₀, and 45 dBZ height H₄₅ of the cell pairs were relatively higher, but for the vertical cumulative liquid water content (VIL) it was relatively poor. (2) After processing by using the time shift technique, the change trends of the characteristic parameters of the two cell pairs were more consistent and the degree of similarity was higher. (3) The fluctuation periods of Z_max and VIL of both two cell pairs had good consistency, and fluctuation periods of H₀ and H₄₅ of C and D cell pair had better consistency. (4) The main reason for the poor value similarity of VIL of the cell pairs was the difference in the value of the radar reflectivity factor Z of each scan layer and the vertical height of Z.