Compound cyclone separator

The invention discloses a compound cyclone separator which comprises a straight tube. A guide vane is arranged in the straight tube which is connected with an open tube. The open tube is in a horn shape. A rectifier is arranged below the open tube, and the rectifier is in a cone shape. A V-shaped cavity is formed between the open tube and the rectifier and communicates with the straight tube. An annular tube is connected to the bottom of the cavity. A plurality of cyclone separator bodies are evenly connected to the outer circumference of the annular tube. The cyclone separator bodies are connected with the annular tube through connection tubes. The compound cyclone separator is convenient to install, simple in structure and low in machining cost; the processing capacity of the cyclone separator is greatly improved; and the pressure loss of liquid in a distributor and the cyclone separator is small, flow distribution is uniform, and the integral operating performance is remarkably improved.