The invention discloses a cantilever type double-emptying device in an automatic filling binding machine, which belongs to a food packing machine. The double-emptying device consists of a first emptying part and a second emptying part for emptying a binding buckled part twice in turn; a bracket assembly of the first emptying part is clamped between bracket assemblies of the second emptying part; at the binding buckled part, the emptying part center line of the second emptying part is 6 to 8 millimeters higher than the emptying part center line of the first emptying part; and two sets of frontand rear opposite cams, namely square bearing sets are arranged on a cam shaft in a matched cam clutch mechanism at the same time and hinged with the bracket assemblies of the second emptying part and the first emptying part through stroke brackets together. The device is an improvement on the conventional three-post supporting cantilever type single emptying device; the rear emptying of the second emptying part can totally empty the residual filler in the first emptying part and can upwards eject the residual small block material so that the residual small block material leaves the binding port and the purposes of full emptying and no residual filler are fulfilled; and the device is sanitary and environment-friendly, saves raw materials, and can compact finished products, improve the quality of the products, improve the production efficiency and reduce the production cost.