The invention relates to the technical field of preparing nickel oxide and recovering hydrochloric acid, and in particular relates to a process and equipment for preparing nickel oxide and recovering hydrochloric acid. The equipment comprises a nickel oxide solution tank for recovering waste acid, a waste acid filter, a pre-concentrator, a baking furnace, a furnace top spraying device, burners in tangent distribution, a rotary horizontal mixer, a breaker, a rotary valve, a nickel oxide powder pneumatic conveying and collecting system, a first-stage absorption tower, a second-stage absorption tower, a smoke exhaust fan, a washing tower, a feeding pump sealing as well as cooling water circulating and supplying device, a pyrolysis acid storage tank, a conveying pipeline, a gas and liquid separator, a chimney, a dust extractor, a pneumatic feeding device, a feeding pipeline online cleaning device, a combustion supporting and heating device, a back-flushing flow aiding device, a chlorine removal device and an air purifier. The process and the equipment for preparing nickel oxide and recovering hydrochloric acid have the following advantages that reaction temperature regulating range of the baking furnace is widened, waste gas reaches the discharge standard, equipment utilization rate of the baking furnace is improved, and environmental pollution is avoided.