The utility model relates to a four-freedom-degree parallel connection operating platform which is composed of a movable operating platform body, two fixed long rods, two expansion rod mechanisms and two LM rolling guide rail intelligent combined units. The movable operating platform body is connected with the two fixed long rods and the two expansion rod mechanisms through four spherical hinges, the two fixed long rods are symmetrical, the two expansion rod mechanisms are symmetrical, the other end of each expansion rod mechanism is connected with a numerically-controlled machine tool operation platform body through a hooke joint, the other end of each fixed long rod is connected with a nut sliding block in each LM rolling guide rail intelligent combined unit on the numerically-controlled machine tool operation platform body, and the LM rolling guide rail intelligent combined units are driven by a stepper motor. The four-freedom-degree parallel connection operating platform can achieve two rotation freedom degrees of the platform around an X axis and a Y axis and two translational freedom degrees of the platform around the Y axis and a Z axis through the LM rolling guide rail intelligent combined units and expansion rod mechanisms. The four-freedom-degree parallel connection operating platform can be combined with numerically-controlled machine tools in different types, such as milling numerically-controlled machine tools, drilling numerically-controlled machine tools and machining centers, for use.