Abstract: The discussion addresses several key issues respective to development of two-high and multi-high cold-rolling pipe mills,focusing on relevant theoretic analysis and comparisons concerning selections of such data as the main parameter series,mill block stroke,the crank turning,synchronous gear indexing wheel diameter and modulus,single or dual rotary feeding as well as roll number of the multi-high mill.Based on the result,counter-measures are proposed.Moreover,the author recommends a newly-developed rolling mill balancing system,i.e.,the dual eccentric gear balancing system and a new structure of the centering system for the multi-high mill head.