The invention discloses an opening structure of vertical cleaner dust collecting device, which comprises the following parts; the cleaner body, a dust collecting device capable of being assembled and disassembled on the body, a dust collecting drum used for absorbing the foreign bodies, an upper cover used for covering the upper surface of the dust collecting grum and a handle formed on the uppercover. The invention is characterized in that: a sunken is formed at one side of a sponge cover of the upper cover and a heave is shaped on the surface of the dust collecting drum; a fixed part is shaped on a dust cap of the upper cover, which is connected with a key-press. The invention has the advantages of deduced parts and lowered cost, which is convenient for customer to use and is beautifulat the same time.