A rotary screen tower used for liquid-liquid extraction comprises an organic phase clarification section, a mixing section, an aqueous phase clarification section, a driving mechanism, a first fixed screen, a second fixed screen and a rotary shaft. The mixing section is placed between the organic phase clarification section and the aqueous phase clarification section, the first fixed screen the is arranged on a joint face of the organic phase clarification section and the mixing section, and the second fixed screen the arranged on a joint face of the mixing section and the aqueous phase clarification section. The driving mechanism is arranged at the top of the organic phase clarification section, one end of the rotary shaft is connected with the driving mechanism, and the other end of the rotary shaft penetrates through the organic phase clarification section and the first fixed screen, is stretched into the inner cavity of the mixing section, and is arranged on a supporting seat arranged at the bottom of the mixing section. The mixing section is composed of at least two tower sections, each tower section is provided with at least one extraction chamber, each extraction chamber is defined by a corresponding tower section outer shell and two annular horizontal baffles in enclosed mode, the annular horizontal baffles are arranged inside the outer shell, a perpendicular baffle and a rotary screen are arranged in each extraction chamber, the perpendicular bafflers are arranged the inner wall of the outer shell, and the rotary screens are arranged on the rotary shaft.