The invention discloses a coal-fired incineration technology system for petroleum solid waste. The coal-fired incineration technology system comprises an incinerator, wherein a mixing device is arranged at the front end of a feeding opening of a primary combustion zone of the incinerator; the mixing device is connected with a solid waste incoming pipe; pulverized coal inlets are formed in the primary combustion zone and a secondary combustion zone of the incinerator; the pulverized coal inlets communicate with closed pulverized coal channels; a communication pipe is arranged between a tail gas outlet of the incinerator and the pulverized coal channels; and an air blower is arranged inside the communication pipe. According to the coal-fired incineration technology system, the mixing device is adopted to uniformly mix petrochemical solid waste such as waste liquor, solid residues and sludge, and the mixture is fed into the incinerator to be incinerated, so that the incineration efficiency of solid waste can be improved; the pulverized coal is adopted to replace fuel oil for combustion, so that the industrial cost can be reduced; tail gas is adopted as transportation power to feed the pulverized coal into the incinerator, pollutants carried in the tail gas can be subjected to secondary combustion, and the pollution degree of the tail gas is reduced; and besides, the tail gas has a high temperature, so that the combustion temperature of the incinerator can be increased, and the combustion efficiency is improved.