A fuse, comprising: a housing, a closed chamber being provided in the housing, the closed chamber being filled with an arc extinguishing filler (10, 31), and a first conductive terminal (3, 27, 41) and a second conductive terminal (4, 23, 42) which are respectively used as a current input end and a current output end being connected to the housing; a fusant (9, 30), connected in series between the first conductive terminal (3, 27, 41) and the second conductive terminal (4, 23, 42), and at least partially provided in the closed chamber in a penetrating manner; and an impact apparatus, provided in the housing and located outside the closed chamber, and configured to act, when receiving an excitation signal, on the fusant (9, 30) to generate an impact force so as to make the fusant (9, 30) broken in the closed chamber; wherein a plurality of closed chambers are provided, a corresponding fusant segment (9, 30) is provided in each of the closed chambers in a penetrating manner, and the plurality of fusant segments (9, 30) provided in the plurality of closed chambers in a penetrating manner are connected in series or in parallel; wherein each fusant segment comprises a plurality of fusant elements (47, 48, 57, 58) connected in parallel, wherein the plurality of fusant elements (47, 48, 57, 58) are provided in each of the closed chambers in a penetrating manner, characterised in that the plurality of fusant elements connected in parallel are provided as a first fusant element (48, 58) to be broken first and a second fusant element (47, 57) to be broken later; wherein the fuse further comprises a fusant punch, the fusant punch is provided on an outer wall of the closed chamber in a dynamic sealing manner, with one end being linked with the impact apparatus, and the other end being opposite to the first fusant element to be broken first, and is configured to move and break the first fusant element to be broken first by impacting when the impact apparatus acts; and wherein the second fusant element to be broken later is provided with a zigzag segment, configured to be broken after extending to a predetermined length. a housing, a closed chamber being provided in the housing, the closed chamber being filled with an arc extinguishing filler (10, 31), and a first conductive terminal (3, 27, 41) and a second conductive terminal (4, 23, 42) which are respectively used as a current input end and a current output end being connected to the housing; a fusant (9, 30), connected in series between the first conductive terminal (3, 27, 41) and the second conductive terminal (4, 23, 42), and at least partially provided in the closed chamber in a penetrating manner; and an impact apparatus, provided in the housing and located outside the closed chamber, and configured to act, when receiving an excitation signal, on the fusant (9, 30) to generate an impact force so as to make the fusant (9, 30) broken in the closed chamber; wherein a plurality of closed chambers are provided, a corresponding fusant segment (9, 30) is provided in each of the closed chambers in a penetrating manner, and the plurality of fusant segments (9, 30) provided in the plurality of closed chambers in a penetrating manner are connected in series or in parallel; wherein each fusant segment comprises a plurality of fusant elements (47, 48, 57, 58) connected in parallel, wherein the plurality of fusant elements (47, 48, 57, 58) are provided in each of the closed chambers in a penetrating manner, characterised in that the plurality of fusant elements connected in parallel are provided as a first fusant element (48, 58) to be broken first and a second fusant element (47, 57) to be broken later; wherein the fuse further comprises a fusant punch, the fusant punch is provided on an outer wall of the closed chamber in a dynamic sealing manner, with one end being linked with the impact apparatus, and the other end being opposite to the first fusant element to be broken first, and is configured to move and break the first fusant element to be broken first by impacting when the impact apparatus acts; and wherein the second fusant element to be broken later is provided with a zigzag segment, configured to be broken after extending to a predetermined length.