The redox reaction kinetics of polysulfides conversion was sluggish during the charging/discharging process, which resulted in serious shuttle effect and capacity decay of lithium-sulfur batteries. Therefore, high-performance electrocatalysts for accelerating the polysulfides conversion process were highly desired. Herin, porous carbon spheres loaded with Co-doped molybdenum disulfide (pcs-Co@MoS2) were synthesized as high performance polysulfides conversion catalysts by using metal-organic coordination polymers as precursors. The lower Tafel slopes (55.47 mV/dec and 27.57 mV/dec) of the batteries consisting of pcs-Co@MoS2 are observed during charging and discharging process, indicating a fast reaction kinetics. Potentiostatic discharge test shows that batteries with pcs-Co@MoS2 have a higher deposition capacity of Li2S (155.07 mAh/g), which reflects the high sulfur utilization. The cycling performance as assembled lithium sulfur batteries is greatly improved in terms of the initial discharge specific capacity at the rate of 0.5 C (796 mAh/g) measured by charge-discharge test. Most importantly, the capacity retention of the battery is reach to 80% and the decay rate per cycle is only 0.09% after 200 cycles at the charge/discharge rate of 1 C during cycling test.