The invention discloses a mixed soundproof wall. The mixed soundproof wall is formed by periodically and crossly arraying mixed soundproof units composed of a passive soundproof unit and an active soundproof unit; and the mixed soundproof wall is a unidirectional soundproof wall and can be used for stopping noises in one direction. The passive soundproof unit is made of a common passive soundproof material; the active soundproof unit is a pipeline with a rectangular section and has ventilation and light-transmission functions; and the pipeline is internally provided with one set of single-channel active control system. The single-channel active control system is a feedforward active control system or a feedback active control system. The mixed soundproof wall disclosed by the invention is used for insulating sounds and meanwhile has functions of naturally ventilating, and venting and dissipating heat; active and passive noise reduction technologies are combined; a noise reduction frequency band can reach a high frequency band and the noise reduction frequency band is wide; the single-channel active control system is low in cost and easy to realize; the section shape of the unit can be designed according to requirements of engineering implementation; and the mixed soundproof wall is practical and beautiful and the quantity of the units can be increased and decreased arbitrarily and the expansion is convenient.