The invention relates to a convenient-discharging-type feeding device and a gangue throwing machine and belongs to the technical field of coal mine down-hole gangue filling devices. The convenient-discharging-type feeding device comprises a crawler-type travelling vehicle, a supporting mechanism, a discharging platform and a mine vehicle. The discharging platform is obliquely arranged on the crawler-type travelling vehicle through the supporting mechanism, and the discharging platform is provided with the feeding end and the discharging end; a rotary platform used for discharging of the mine vehicle and a rail used for travelling of the mine vehicle are arranged on the discharging platform, and one end of the rotary platform is movably connected with the discharging end of the dischargingplatform through a rotary shaft; one end of the rail abuts against the rotary platform, and the other end of the rail is arranged at the feeding end of the discharging platform; and a first hydraulicoil cylinder driving the rotary platform to rotate upwards is arranged on the lower portion of the rotary platform. The convenient-discharging-type feeding device and the gangue throwing machine havethe characteristics of being simple in structure, small in occupied area and high in working efficiency.