The invention discloses an oil-gas field well drilling waste sludge treatment device. The oil-gas field well drilling waste sludge treatment device comprises a kiln. The kiln comprises a kiln head, a kiln middle portion and a kiln tail. The kiln middle portion is rotationally connected with the kiln head and the kiln tail respectively. A rotational driving mechanism is arranged below the kiln middle portion. A pulverized coal feed pipe, a material feed pipe, a pulverized coal air inlet pipe and a material air inlet pipe are arranged on the front portion of the kiln head. A pulverized coal hopper is mounted at the upper end of the pulverized coal feed pipe. A material hopper is mounted at the upper end of the material feed pipe. A pulverized coal blower is connected to an air inlet of the pulverized coal air inlet pipe. A material blower is connected to an air inlet of the material air inlet pipe. A lighting-up tuyere is arranged on the kiln head. A discharge outlet is arranged at the bottom of the kiln tail. An exhaust outlet is arranged on the upper portion of the kiln tail. A gas purification system is connected to the exhaust outlet. The oil-gas field well drilling waste sludge treatment device has the advantages that harmless treatment of well drilling waste materials is realized, treated mixtures meet three-level standards of natural soil quality, components are highly integrated, occupied area of the device is small, concentration and continuation in operation are achieved, and treatment efficiency is high.