The invention provides a pulverized coal pyrolysis-coke powder combustion power generation coupled system. According to the invention, the raw coal outlet of a raw coal bunker is connected with the raw coal inlet of a mill; the outlet of the mill is connected with the inlet of a cyclone separator; the coarse pulverized coal outlet of the cyclone separator is connected with the inlet of a coarse pulverized coal surge bunker; the fine pulverized coal outlet of the cyclone separator is connected with the inlet of a bag type dust collector; the fine pulverized coal outlet of the bag type dust collector is connected with the inlet of a fine pulverized coal surge bunker; the coarse pulverized coal outlet of the coarse pulverized coal surge bunker is connected with the coarse pulverized coal inlet of a pyrolysis reactor; the outlet of the pyrolysis reactor is connected with the inlet of a separation system; the solid outlet of the separation system is connected with the inlet of a coke powdersurge bunker; the gas outlet of the separation system is connected with the inlet of a tar recovery system; the fine pulverized coal outlet of the fine pulverized coal surge bunker and the hot coke powder outlet of the coke powder surge bunker are connected with the fuel inlet of a boiler; and the steam outlet of the boiler is connected with a generator set. The pulverized coal pyrolysis-coke powder combustion power generation coupled system provided by the invention can improve the utilization rate of pulverized coal, reduces the energy consumption of combustion power generation, does not need large transformation for a power generation boiler, and is low in cost.