A split micro-valve comprises a valve plug (3) and a valve body (1, 4). The valve body (1, 4) is a split structure and comprises a front valve body (1) and a rear valve body (4). The front valve body (1) has a valve chamber (10) which comprises a liquid outlet (5) at one end and an interior thread (6) at the other end. The rear valve body (4) comprises a liquid inlet (9) at one end and an exterior thread (8) at the other end. The interior thread (6) of the front valve body (1) is connected to the exterior thread (8) of the rear valve body (4) in a threaded manner. The rear valve body (4) comprises a valve seat (7) at its threaded end. A valve plug (3) is located inside the valve chamber (10), and is cooperated with the valve seat (7) of the rear valve body (4). The valve body (1, 4) can be assembled easily and the size of the valve chamber (10) can be changed by replacing the front valve body (1).
