The present disclosure discloses a connection terminal, a method of connecting a plurality of wires using the connection terminal, and a pressing die. The connection terminal is made of a metal sheet and includes: a body portion having a first edge and a second edge extending in a longitudinal direction of the body portion and opposite to each other in a transverse direction of the body portion; and a first wing and a second wing extending from the first edge and the second edge, respectively. The first wing and the second wing are opposite to each other in the transverse direction of the body portion, and a length of the first wing extending from the first edge is greater than that of the second wing extending from the second edge, and inner surfaces of the first wing, the second wing, and the body portion are provided with a plurality of first grooves. Since the first wing and the second wing connected to the body portion of the connection terminal have different lengths and are provided with first grooves, in the case where the first wing and the second wing are bent to crimp the wires, the second wing is held between the first wing and the wires by the first wing so that the wires are crimped by two layers of wings and securely retained in the connection terminals.