The invention relates to an end effector of a dry land potted tray seedling transplanter, which is characterized by comprising a stander (1) connected with a mechanical arm of the transplanter, wherein a motor (24) is arranged in the stander (1), an output shaft of the motor (24) is connected with a cylindrical cam (10), a driven link roller (12) of the cylindrical cam (10) is arranged on a pointer fixed ring (13), at least three pointers (14) are fixed on the pointer fixed ring (13), the lower end of the stander (1) is connected with pointer guiding pipes (19), each pointer (14) is arranged in each pointer guiding pipe (19) respectively, the length of the pointer (14) is longer than that of the pointer guiding pipe (19), and the lower end of the pointer guiding pipe (19) bends inwards. The end effector has a simple and compact integral structure, is convenient to mount and demount, has good independence, not only can be used in parallel to improve the working efficiency of picking seedlings but also can be controlled singly to increase the flexibility of picking the seedlings, and has light volume and low cost.