Metathesis cyclopolymerization (MCP) of ionic 1,6-heptadiyne is successfully applied to synthesize polyacetylene (PA) ionomer in different solvents especially in imidazolium-based ionic liquid (IL), and MCP of ionic monomer in the mixture of THF/IL Ru-based catalyst proceeded in a controlled manner by the action of Grubbs second and third generation catalysts (Ru-II, Ru-III). The influence of catalysts and solvents on polymerization behavior and chain microstructure was investigated, and the results revealed that the isolated polymer yield could reach to 97% and 82% by Ru-III and Ru-II, respectively, in 1:2 THF/IL after optimization, and PAs incorporating imidazolium pendent contained >= 95% five-membered-ring structure and almost all trans-double bonds along the backbone. PAs formed in different solvents reflected significant variance in optical absorption properties, and a bathochromic shift effect was observed with the mixture of THF/IL.