The invention discloses a sludge drying and incinerating technology. The technology comprises the following specific steps that firstly, wet sludge is conveyed into a sunshine room; secondly, a flat plate drying system is sequentially inflated with steam, high-temperature smoke and hot mixed gas for heating, and the sludge is dried; thirdly, the temperature of the steam is gradually decreased, then the steam becomes water, the water enters a main pipeline through a water conveying hose and then returns to a boiler to be continuously heated, the water is boiled into steam, and cyclic utilization is achieved; after entering the main pipeline, the smoke is exhausted after being subjected to tail gas treatment and reaching the standard; after being conveyed to the main pipeline through a draught fan, the hot mixed gas is exhausted to the position of the boiler to be heated so as to be recycled; and fourthly, the dried sludge is conveyed into the boiler to be incinerated, and ash obtained after incineration of the sludge is discharged out of the boiler to be subjected to resource utilization. The technology process is simple, and the purpose of reducing energy consumption is achieved. The ash obtained after incineration can be subjected to resource utilization, the cooled smoke can be exhausted only after reaching the standard through tail gas treatment, and the requirements for resource reutilization and environment protection are met.