The invention relates to a single-system computerized flat knitting machine with double-system functions. At present, a similar single-system computerized flat knitting machine which is low in production cost, low in abrasion and long in service life does not exist. The single-system computerized flat knitting machine comprises a machine frame, a machine seat, needle boards, machine heads, large levers and a display screen, wherein each single-system flat knitting machine base plate comprises a base plate body, a needle turning triangle, a center triangle and a driving mechanism; the single-system computerized flat knitting machine is characterized in that each driving mechanism comprises a driving motor, an upper output shaft, a lower output shaft, a cam, a needle turning knocking rod, a gear and a sliding plate; the back faces of the needle turning triangles are respectively provided with a needle turning guide column; the driving motors are respectively and fixedly arranged on the base plate bodies; the cams are respectively and fixedly arranged on the upper output shafts; the needle turning knocking rods are respectively installed on the base plate bodies; the gears are respectively and fixedly arranged on the lower output shafts; left guide grooves and right guide grooves are of a waveform structure respectively; the gears are respectively engaged with racks. The single-system computerized flat knitting machine is rational in structure design, low in production cost, low in abrasion, long in service life, and capable of simultaneously completing knitting and tucking functions in the same rows.