The invention discloses a film coating machine. The film coating machine comprises a charging mechanism, a vacuum furnace, a transmission conveying mechanism, a sputtering target set, a vacuum suction set and a control center; the charging mechanism is arranged at the position, close the edge, of the top end of the vacuum furnace; the bottom of the charging mechanism communicates with the vacuum furnace; the sputtering target set is located at the position, adjacent to the charging mechanism, of the top end of the vacuum furnace; the transmission conveying mechanism is arranged in the vacuum furnace and corresponds to the sputtering target set; the bottom end of the transmission conveying mechanism is detachably connected with the inner side of the bottom of the vacuum furnace; the vacuum suction set is located on the outer side of the vacuum furnace and communicates with the vacuum furnace through a pipeline; a heating system is arranged on the inner side wall of the charging mechanism; and the transmission conveying mechanism, the sputtering target set, the vacuum suction set and the heating system are all electrically connected with the control center. The film coating machine performs vacuumizing in three stages, it is guaranteed that no obvious pressure difference is generated during vacuumizing, and powder is prevented from flying up; and the transmission conveying mechanism is integrally arranged so that detachment, replacement or cleaning can be convenient, and proper vibration source adjustment can also be performed according to the size of powder particles.