The invention discloses a vacuum type filament film assembling device, which comprises a sealed box body, a push rod, a vacuum pump, a cylinder and an air pump. The sealed box body is provided with agas input port and a push rod penetration port, the push rod is pierced at the push rod piercing opening, one end of which is located in the sealed box, the push rod has a gas extraction passage, thevacuum pump is connected to the gas extraction passage and is located outside the sealed box, the air cylinder is connected with one end of the push rod which is located outside the sealed box body. The air pump is connected to the air input port and the air cylinder. The partition plate and the filament film structure arranged in the protective bag body are arranged in the sealed box body. The protective belt body is sleeved on the push rod, the gas extraction passage is communicated with the protective bag body, the vacuum pump extracts the gas in the protective bag through the gas extraction passage, and the air pump supplies the gas into the sealed box body, so that the pressure difference between the inside and the outside of the protective bag body is formed to compress the silk filmstructure.