The invention relates to the technical field of mechanical processing lathes, and specifically relates to a double-spindle double-cutter-tower lathe. The double-spindle double-cutter-tower lathe comprises a fixed base, first moving mechanisms, second moving mechanisms, a separating plate, third moving mechanisms, a fixing mechanism, a showering and washing mechanism and an impurity removing mechanism, wherein two symmetric first moving mechanisms, second moving mechanisms and third moving mechanisms are provided, so that the processing efficiency of the double-spindle double-cutter-tower latheis improved, and moreover, a first rotating column of a double-cutter tower can freely rotate during process; an idle mechanism can be randomly replaced for processing, and the operation is convenient and quick. According to the double-spindle double-cutter-tower lathe, the showering and washing mechanism is arranged on a third fixed plate and positioned on the top part of the fixing mechanism, so that chips on a fixed workpiece can be effectively flushed and can be timely cleaned; and meanwhile, the temperature decrease effect is effectively realized, so that the service life of the mechanism can be prolonged; and the workpiece can be timely put into use; the chips flushed by the showering and flushing mechanism are collected through a cloth bag, and water is filtered. Therefore, the problem that the environment is polluted by the chips can be prevented; and the chips can be collected and recycled.