The application discloses sliding trolley device, the coaster that includes the coaster hook and have the haulage rope, coaster hook with the coaster is connected, unmanned aerial vehicle and operating system looks communication connection, coaster hook is including the coupler body, from latch fitting, buckling piece and connecting piece, the first end of coupler body with the connecting piece is articulated mutually, and the first end of buckling piece is connected with the connecting piece, and the second end of buckling piece can move along the orientation of the first end near the coupler body with the second end looks butt of coupler body and buckling piece, include from the latch fitting that check lock lever and cover locate the spring in the check lock lever outside, the one end of check lock lever has the wedge pointed end, and the other end of check lock lever has the pull ring, and two tip of check lock lever do not expose in two tip of connecting piece, and the spring is placed in the mounting hole, the first end of coupler body is provided with the draw -in groove, the wedge pointed end can with draw -in groove looks joint or phase separation, the coupler body has a go -between, and the one end of connecting the rope is connected with the go -between, connect the rope the other end and unmanned aerial vehicle is connected.