An LED strip light for shelf signboards, the shelf comprising at least one laminate which comprises one card board for setting the LED strip light for shelf signboards, characterized in that comprising: a strip-shaped lamp chamber and an LED light-emitting module disposed within the strip-shaped lamp chamber, on a cross-section perpendicular to the extending direction of the strip-shaped lamp chamber, the strip-shaped lamp chamber comprising: a card board connecting edge for connecting the card board, a non-transparent edge spaced from the card board connecting edge, an upper transparent edge connecting the card board connecting edge and the non-transparent edge, a lower transparent edge connecting the card board connecting edge and the non-transparent edge and spaced from the upper transparent edge, the upper transparent edge being parallel to the laminate, the length of the card board connecting edge being less than that of the non-transparent edge, the LED light-emitting module which is provided on the card board connecting edge comprising at least one LED chip and a strip lens arranged in the light emitting direction of the LED chip, on a cross-section perpendicular to the extending direction of the strip-shaped lamp chamber the strip lens comprising an incident surface, a first fully reflecting surface, a second fully reflecting surface, a refractably reflecting surface connected to the second fully reflecting surface and a boundary line between the first fully reflecting surface and the second fully reflecting surface, the first fully reflecting surface reflecting all the incident light thereon toward the upper transparent edge, the second fully reflecting surface reflecting all the incident light thereon toward the refractably reflecting surface, the refractably reflecting surface refracting the light from the incident surface and reflecting the light from the second fully reflecting surface, the emergent light of the refractably reflecting surface being directed toward the lower transparent edge, and the boundary line intersecting the optical axis of the LED chip. a strip-shaped lamp chamber and an LED light-emitting module disposed within the strip-shaped lamp chamber, on a cross-section perpendicular to the extending direction of the strip-shaped lamp chamber, the strip-shaped lamp chamber comprising: a card board connecting edge for connecting the card board, a non-transparent edge spaced from the card board connecting edge, an upper transparent edge connecting the card board connecting edge and the non-transparent edge, a lower transparent edge connecting the card board connecting edge and the non-transparent edge and spaced from the upper transparent edge, the upper transparent edge being parallel to the laminate, the length of the card board connecting edge being less than that of the non-transparent edge, the LED light-emitting module which is provided on the card board connecting edge comprising at least one LED chip and a strip lens arranged in the light emitting direction of the LED chip, on a cross-section perpendicular to the extending direction of the strip-shaped lamp chamber the strip lens comprising an incident surface, a first fully reflecting surface, a second fully reflecting surface, a refractably reflecting surface connected to the second fully reflecting surface and a boundary line between the first fully reflecting surface and the second fully reflecting surface, the first fully reflecting surface reflecting all the incident light thereon toward the upper transparent edge, the second fully reflecting surface reflecting all the incident light thereon toward the refractably reflecting surface, the refractably reflecting surface refracting the light from the incident surface and reflecting the light from the second fully reflecting surface, the emergent light of the refractably reflecting surface being directed toward the lower transparent edge, and the boundary line intersecting the optical axis of the LED chip.