Abstract: A tethered unmanned rotorcraft chain platform system and liquid continuous spraying system includes a mobile mooring platform, a power system, a tether, multiple unmanned rotorcrafts, a central control system and a liquid continuous spraying system. The power system moves with the mobile mooring platform and provides electrical power to the multiple unmanned rotorcrafts by the tether. The tether is lifted in the air by the multiple unmanned rotorcrafts to form a three-dimensional polyline/curve, so as to avoid or bypass obstacles and adapt to the terrain variation, thus greatly expanding the horizontal space that can be reached by the tethered unmanned rotorcraft chain and its payload. The delivery pipeline of the liquid continuous spraying system is arranged along the tether to continuously supply a liquid such as agricultural chemicals to spraying nozzles mounted on the delivery pipeline or the unmanned rotorcrafts.