The invention relates to a shunt tripping coil which relates to a tripping coil of a circuit breaker. The shunt tripping coil comprises a coil frame (2), and the outer surface of the coil frame (2) is wounded with lacquered wires. The shunt tripping coil is characterized in that a frame outer housing (1) is sleeved on the outer surface of the coil frame (2), epoxide resin is filled between the frame outer housing (1) and the coil frame (2), a through hole A (8) is arranged in the central part of the coil frame (2) along the axial direction, an iron core moving part (3) is arranged at one end in the through hole A (8), an iron core fixed part (6) is arranged at the other end in the through hole A (8), an aluminum nail (4) provided with a spring (5) is arranged between the iron core moving part (3) and the iron core fixed part (6), and one end of the aluminum nail (4) passes through the iron core fixed part (6); and a down-wire fixing groove A (24) and a down-wire fixing groove B (25) are respectively arranged at two ends of the coil frame (2). The invention has the advantages of simple structure, convenient epoxide resin filling, uneasy glue leakage during the filling, high compression strength, accurate structure positioning and stable performance.