The invention relates to a disposal system for in-situ curing and stabilizing polluted soil and belongs to the technical field of environmental geotechnical engineering. The disposal system comprises a crawler excavator, a crawler, a stirring head, a hydraulic telescopic rod, a line and pipe control collector, an operating control system, a power dispenser, a pneumatic power device, a water tank, a hydraulic power unit and relative sensors. A driver of the mixing head driven by the hydraulic power unit is safe and reliable; a drill is capable of crushing rocks and lumps in the polluted soil, adapting to the construction of complex conditions, and guaranteeing the work efficiency of a stirring wheel and the safe operation of the stirring head; the hydraulic telescopic rod ensures the stirring head to reach greater depth of construction; materials and power devices are disposed on the crawler, which is convenient to synchronize with the crawler excavator during the transportation and construction and adaptable to complex construction environment; and a solenoid valve and sensors are connected with the operating control system on which relative construction parameters are set so as to perform real-time recording and processing data, thereby greatly improving the work efficiency.