A production process of cis-rich polybutadiene is to polymerize 1,3-butadiene under the temperature of 40~120íµ in hydrogenated gasoline. The process is characterized in that the initiation system is composed of nickel naphthenate, triisobutylaluminum, boron trifluoride D complex, wherein, D is a C6~C18 alcohol, an ester composed of C2~C4 alkyl acid and C4~C6 alkyl alcohol, or a R3N tertiary amine substance wherein the R is a C4~C8 alkyl. By regulating the content of boron trifluoride D complex, a cis-rich polybutadiene with 25~100 Mooney viscosity, less than 0.05% gel can be synthesized. The cis-rich polybutadiene has improved processing properties and stress at definite elongation, lower Mooney viscosity by 10 Mooney unit than that of general cis-1,4-polybutadiene rubber BR900 with the same molecular weight. The invention has advantages of low energy consumption, simple operation, steady production, long running period, and high conversion rate.