A semi-automatic connector for flexible circuit, comprising a lead wire (6), an upper housing (1), a lower housing (2) and an insert snap portion (4); a button hole (1.1) being opened on the upper housing (1) and a button (3) being disposed in the button hole (1.1); wherein a circuit board (5) is disposed in the lower housing (2) and the top surface of the circuit board (5) provided with elastic sheets (5.1), the circuit board (5) is connected to one end of the lead wire (6); the insert snap portion (4) is disposed above the circuit board (5) with a cavity to receive a flexible circuit pad; the insert snap portion includes two elastic arms (4.1) in parallel and a barb snap (4.1.1) is provided on a free end of each flexible arm (4.1); within the cavity, the flexible circuit pad (8) is being locked as the two barb snaps engaging with recesses (8.1) on the flexible circuit pad (8) and the bottom surface of the flexible circuit pad (8) is in close contact with the elastic sheets (5.1) on the top surface of the circuit board (5); as the button (3) is being pressed downwards, the elastic arms (4.1) are bent until the two barb snaps (4.1.1) on the insert snap portion out of recesses (8.1) of the flexible circuit pad (8). The structure is simple with fewer components and flexible and reliable in connection, which is not easy to detach. The connector has a defibrillation function.