A numerical control product line of an agricultural mini-tiller walking box is formed by sequential arrangement of two parts together, namely, a three coordinate perpendicular double main shafts numerical control lathe and a rotatable combined machine tool, wherein firstly, the three coordinate perpendicular double main shafts numerical control lathe comprises a first main shaft (101), a second main shaft (102), a main shaft locking device (103), a dedicated hydraulic fixture (104), a turret (105), an oil-distribution system (106), a two coordinate universal driving shaft (107), and a machine tool body; secondly, the rotatable combined machine tool is specific a six station rotatable combined machine tool comprising a combined machine tool body (201), a positioning seat (202), a drill hole power head (203), a tapping power head (204), and a hydraulic overturn clamp (205). According to the invention, the process route is obviously shortened, the situation that several processes are combined to one is realized, each standard precision of one-time clamping is extremely high, the whole line is shorted more than 60 % than an original product line, the pitch time is shortened more than 50 %, and the product qualified rate is improved more than 20 %.