A contact structure of a low-voltage electrical apparatus, wherein the contact structure is in a dual-breakpoint form, the contact structure comprising: two static contacts; a contact bridge; two movable contacts, disposed on the contact bridge, and respectively corresponding to the two static contacts; a contact support member, in a normal open position and a closed position disposed on the contact bridge and connected to the movable contacts; two main contact springs, in the normal open position and the closed position symmetrically disposed under the movable contacts, connected to the contact bridge and forming an angle with the contact bridge; and a spring support member connected to the two main contact springs; wherein at a normal contact position of the static contact and the movable contact, the angle between one of the main contact springs and the contact bridge is between -β and +α; when the angle between one of the main contact springs and the contact bridge is +α, it is a stable position and the movable contacts and the static contacts are at the closed position; and when the contact normally opens, the angle between one of the main contact springs and the contact bridge is between + α to 0°, characterized in that the two static contacts are U-shaped static contacts, the U-shaped static contact enabling the current direction in the static contact to be opposite to the current direction in a movable contact; the spring support member is disposed under the two movable contacts; and in that at a repulsed open position of the static contact and the movable contact, the angle between one of the main contact springs and the contact bridge is between -β and +α; when the angle between one of the main contact springs and the contact bridge is -β, it is another stable position and the movable contacts and the static contacts are at the repulsed open position; and when breaking short-circuit currents, the static contacts are repulsed from the movable contacts, and the angle between one of the main contact springs and the contact bridge is inversed to -β. two static contacts; a contact bridge; two movable contacts, disposed on the contact bridge, and respectively corresponding to the two static contacts; a contact support member, in a normal open position and a closed position disposed on the contact bridge and connected to the movable contacts; two main contact springs, in the normal open position and the closed position symmetrically disposed under the movable contacts, connected to the contact bridge and forming an angle with the contact bridge; and a spring support member connected to the two main contact springs; wherein at a normal contact position of the static contact and the movable contact, the angle between one of the main contact springs and the contact bridge is between -β and +α; when the angle between one of the main contact springs and the contact bridge is +α, it is a stable position and the movable contacts and the static contacts are at the closed position; and when the contact normally opens, the angle between one of the main contact springs and the contact bridge is between + α to 0°, characterized in that the two static contacts are U-shaped static contacts, the U-shaped static contact enabling the current direction in the static contact to be opposite to the current direction in a movable contact; the spring support member is disposed under the two movable contacts; and in that at a repulsed open position of the static contact and the movable contact, the angle between one of the main contact springs and the contact bridge is between -β and +α; when the angle between one of the main contact springs and the contact bridge is -β, it is another stable position and the movable contacts and the static contacts are at the repulsed open position; and when breaking short-circuit currents, the static contacts are repulsed from the movable contacts, and the angle between one of the main contact springs and the contact bridge is inversed to -β.