A low-voltage connector, comprising an adaptor and a connector main body , the adaptor is provided with a first connector head (1-1) and a second connector head (1-8) respectively at a front end and a rear end, the connector main body is plug-connected to the second connector head (1-8), and a rear end of the connector main body is adapted to be connected to one or more signal lines; the second connector head (1-8) is provided with first clipping slots (1-9) on a left side and a right side, and the connector main body is provided with elastic arms (2-5) on a left side and a right side that are snap-fitted to the first clipping slots (1-9), to prevent the connector main body from disengaging from the second connector head (1-8); and the second connector head (1-8) is provided with second clipping slots (1-10) on an upper side and a lower side, and the connector main body is provided with longitudinal convex strips (2-3) on an upper side and a lower side that are snap-fitted to the second clipping slots (1-10), to prevent the connector main body from shaking in a left-and-right direction in the second connector head (1-8), wherein the adaptor is provided with an engaging lug (1-7) that protrudes outwardly on a left side or a right side, the engaging lug is provided with a connecting hole, and the adaptor is adapted to be fixed to a housing of another component via the engaging lug, the first connector head (1-1) is provided with a plurality of matching poles (1-5) on an outer wall in a length direction; and steps are provided inside the first connector head (1-1) to gradually reduce internal dimensions, the matching poles (1-5) are not centered on the outer wall of the first connector head (1-1), but are proximal to the side where the engaging lug (1-7) is located. second connector head (1-8) respectively at a front end and a rear end, the connector main body is plug-connected to the second connector head (1-8), and a rear end of the connector main body is adapted to be connected to one or more signal lines; the second connector head (1-8) is provided with first clipping slots (1-9) on a left side and a right side, and the connector main body is provided with elastic arms (2-5) on a left side and a right side that are snap-fitted to the first clipping slots (1-9), to prevent the connector main body from disengaging from the second connector head (1-8); and the second connector head (1-8) is provided with second clipping slots (1-10) on an upper side and a lower side, and the connector main body is provided with longitudinal convex strips (2-3) on an upper side and a lower side that are snap-fitted to the second clipping slots (1-10), to prevent the connector main body from shaking in a left-and-right direction in the second connector head (1-8), wherein the adaptor is provided with an engaging lug (1-7) that protrudes outwardly on a left side or a right side, the engaging lug is provided with a connecting hole, and the adaptor is adapted to be fixed to a housing of another component via the engaging lug, the first connector head (1-1) is provided with a plurality of matching poles (1-5) on an outer wall in a length direction; and steps are provided inside the first connector head (1-1) to gradually reduce internal dimensions, the matching poles (1-5) are not centered on the outer wall of the first connector head (1-1), but are proximal to the side where the engaging lug (1-7) is located. <EOS>