A line source lighting system, comprising: a lamp holder; a printed circuit board, disposed on the lamp holder; a plurality of point light sources, disposed spaced apart from each other along the length direction of the lamp holder on a light source mounting surface of the printed circuit board; at least one lens, disposed on the lamp holder and located in a light-emitting direction of the point light source, configured to adjust the light distribution of the point light source on a plane perpendicular to the length direction of the lamp holder; a strip-shaped convex lens array, disposed on the lamp holder and located in the light-emitting direction of the point light source and arranged along the length direction of the lamp holder, configured to convert the light distribution of each point light source into a linear light distribution as being emitted by a plurality of linear light sources, wherein the strip-shaped convex lens array and the lens are integrally formed; the strip-shaped convex lens array is disposed on a surface on which the light emitting surface of the lens is located; characterized in that the lens comprises a light transmission main part configured to focus a majority part of the light emitted by the point light source, and a light transmission secondary part disposed at an angle which is 90°-160° with one side of the light transmission main part to guide a minority part of the light of the point light source, wherein on a plane perpendicular to the length direction of the lamp holder, the light incident surface of the light transmission secondary part and the light incident surface of the light transmission main part are straight lines, and the angle is formed by the intersecting straight lines. a printed circuit board, disposed on the lamp holder; a plurality of point light sources, disposed spaced apart from each other along the length direction of the lamp holder on a light source mounting surface of the printed circuit board; at least one lens, disposed on the lamp holder and located in a light-emitting direction of the point light source, configured to adjust the light distribution of the point light source on a plane perpendicular to the length direction of the lamp holder; a strip-shaped convex lens array, disposed on the lamp holder and located in the light-emitting direction of the point light source and arranged along the length direction of the lamp holder, configured to convert the light distribution of each point light source into a linear light distribution as being emitted by a plurality of linear light sources, wherein the strip-shaped convex lens array and the lens are integrally formed; the strip-shaped convex lens array is disposed on a surface on which the light emitting surface of the lens is located; characterized in that the lens comprises a light transmission main part configured to focus a majority part of the light emitted by the point light source, and a light transmission secondary part disposed at an angle which is 90°-160° with one side of the light transmission main part to guide a minority part of the light of the point light source, wherein on a plane perpendicular to the length direction of the lamp holder, the light incident surface of the light transmission secondary part and the light incident surface of the light transmission main part are straight lines, and the angle is formed by the intersecting straight lines.