A disc power generator, comprising a first housing and a second housing; wherein the said first housing and the said second housing are locked and fixed together to enclose a receiving space; wherein the middle part of the said first housing and the said second housing have shaft holes (111 and 121) arranged respectively in the middle part of the first housing and the second housing; wherein the said first housing and the said second housing are made by metal stamping; wherein the said disc power generator further comprises a first magnet set and a second magnet set fixedly provided in the receiving space; wherein the said first magnet set comprises multiple platelike first magnets arranged at equal intervals in a circumferential form on a same plane, and the said second magnet set comprises multiple platelike second magnets arranged at equal intervals in a circumferential form on a same plane; wherein the said first magnet set is located on a plane parallel to the plane where the said second magnet set is located, and the two magnetic poles of any one of the said first magnets are arranged in a direction perpendicular to the plane where the said first magnet set is located, and the two magnetic poles of any one of the said second magnets are arranged in a direction perpendicular to the plane where the said second magnet set is located, and a unidirectional magnetic field is formed between the said first magnet set and the said second magnet set; wherein between the said first magnet set and the said second magnet set there is a disc-shaped armature arranged parallel to the plane where the said first magnet set is located; wherein the said armature comprises a disc-shaped board parallel to the plane where the said first magnet set is located; wherein at the middle part of the said board there is a rotating shaft that is fixedly axially mounted; wherein both ends of the said rotating shaft respectively rotatably run in the said shaft holes (111 and 121); wherein the said board is made from the raw material with heat resistance, flame resistance and insulativity, for example phenolic resin (bakelite) material, and made through thermoplastic curing with urotropine as the curing agent; wherein on the said board, multiple coils are fixedly mounted at the center of the said board between the said first magnet set and the said second magnet set, and are arranged at equal intervals in a circumferential form on a same plane; wherein the said coils are in a spiral form and are on the same plane parallel to the said board; wherein the said multiple coils are electrically connected, and through rotation of the said armature generate unidirectional alternating current; wherein on the inner wall of the said first housing there is a first fixed groove arranged corresponding to the said first magnet set and on the inner wall of the said second housing there is a second fixed groove arranged corresponding to the said second magnet set; wherein the said multiple first magnets are fixedly inserted in the said first fixed groove to form the said first magnet set; wherein the said multiple second magnets are fixedly inserted in the said second fixed groove to form the said second magnet set; wherein the said board is provided with a cylindrical fixed station coaxially connected to the middle part of the board; wherein in the middle part of the said board there is an axially arranged mounting hole running through the board; wherein the said rotating shaft comprises a cylindrical shaft core seat and a cylindrical shaft core; wherein one end of the said shaft core seat is axially provided with a first fixed flange corresponding to the said mounting hole, while the other end is fixedly sheathed with a first bearing, and rotatably runs in the said shaft hole of the said second housing; wherein one end of the said shaft core is axially provided with a third fixed groove, while the other end rotatably runs in the said shaft hole of the said first housing, and is axially provided with a fourth fixed groove to fix the said shaft core on the output shaft of the motor; wherein the said first fixed flange on the said shaft core seat fixedly runs in the said mounting hole and runs through the said board; wherein the said first fixed flange runs through a protruding part of the said board, fixedly runs on the second bearing, and fixedly runs in the said third fixed groove of the said shaft core.