The invention provides a device for de-etherizing a trialkyl indium-etherate complex. An overhead tank is arranged for feeding, a reaction tank is used for mixing and dissociation, dissociated ether goes into a receiving tank via a condenser, the de-etherized trialkyl indium mixture is discharged via a discharge valve to be rectified, and the entire reaction is protected by nitrogen gas fed through nitrogen pipes connected with the overhead tank and the condenser. The device dissociates ether as well as simultaneously separates the dissociated ether from the mixture system, thereby achieving the combination of dissociating ether from the conventional trialkyl indium-etherate complex and separating ether in the same device; based on the technical scheme of the invention, the de-etherization efficiency is improved by 20-40 percent while the same amount of trialkyl indium products is obtained; meanwhile, the production efficiency is improved and the production cost is reduced due to the combination of dissociation and separation operated in the same unit.