A compensation method for an asymmetric plate profile of a rolling mill-produced plate/strip, which is used for compensating the asymmetric plate profile of the plate/strip produced by a rolling mill during a rolling process under a current technical condition, comprising: forming a non-linear asymmetric no-load roll gap between a transmission side and an operation side between an upper work roll and a lower work roll by grinding a work roll of the rolling mill to form a non-linear asymmetric no-load roll contour profile curve with respect to a center of a roll; wherein the plate/strip rolling mill used under the current technical condition is selected from anyone of the follows: a two-roll mill driven by the transmission side of the work roll; a four-roll mill based on the two-roll mill added with a supporting roll; and a multi-roll mill based on the four-roll mill further added with a middle roll, characterized in that a roll gap height curve formed by a non-linear asymmetric no-load roll gap includes a polynomial equation; wherein the polynomial equation is cubic or has a higher degree, an axial coordinate of the roll is used as a variable, and not each of coefficients of odd-ordered terms not less than 3 high degree is zero, the polynomial equation can be described by formula as follows: Gap x = Gap 0 + G 1 ⋅ x 1 + G 2 ⋅ x 2 + G 3 ⋅ x 3 +... + G n ⋅ x n wherein, Gap 0 is a set value of a roll gap at a center position of the rolling mill; G 1, G 2, G 3,... G n are the coefficients of the polynomial equation, and the values range from -1 to 1; x is a coordinate of the work roll in the axial direction with the center of the rolling mill as the origin of the coordinate system; and n is selected as any positive integer not less than 3. forming a non-linear asymmetric no-load roll gap between a transmission side and an operation side between an upper work roll and a lower work roll by grinding a work roll of the rolling mill to form a non-linear asymmetric no-load roll contour profile curve with respect to a center of a roll; wherein the plate/strip rolling mill used under the current technical condition is selected from anyone of the follows: a two-roll mill driven by the transmission side of the work roll; a four-roll mill based on the two-roll mill added with a supporting roll; and a multi-roll mill based on the four-roll mill further added with a middle roll, characterized in that a roll gap height curve formed by a non-linear asymmetric no-load roll gap includes a polynomial equation; wherein the polynomial equation is cubic or has a higher degree, an axial coordinate of the roll is used as a variable, and not each of coefficients of odd-ordered terms not less than 3 high degree is zero, the polynomial equation can be described by formula as follows: Gap x = Gap 0 + G 1 ⋅ x 1 + G 2 ⋅ x 2 + G 3 ⋅ x 3 +... + G n ⋅ x n wherein, Gap 0 is a set value of a roll gap at a center position of the rolling mill; G 1, G 2, G 3,... G n are the coefficients of the polynomial equation, and the values range from -1 to 1; x is a coordinate of the work roll in the axial direction with the center of the rolling mill as the origin of the coordinate system; and n is selected as any positive integer not less than 3. a two-roll mill driven by the transmission side of the work roll; a four-roll mill based on the two-roll mill added with a supporting roll; and a multi-roll mill based on the four-roll mill further added with a middle roll, characterized in that a roll gap height curve formed by a non-linear asymmetric no-load roll gap includes a polynomial equation; wherein the polynomial equation is cubic or has a higher degree, an axial coordinate of the roll is used as a variable, and not each of coefficients of odd-ordered terms not less than 3 high degree is zero, the polynomial equation can be described by formula as follows: Gap x = Gap 0 + G 1 ⋅ x 1 + G 2 ⋅ x 2 + G 3 ⋅ x 3 +... + G n ⋅ x n wherein, Gap 0 is a set value of a roll gap at a center position of the rolling mill; G 1, G 2, G 3,... G n are the coefficients of the polynomial equation, and the values range from -1 to 1; x is a coordinate of the work roll in the axial direction with the center of the rolling mill as the origin of the coordinate system; and n is selected as any positive integer not less than 3. Gap 0 is a set value of a roll gap at a center position of the rolling mill; G 1, G 2, G 3,... G n are the coefficients of the polynomial equation, and the values range from -1 to 1; x is a coordinate of the work roll in the axial direction with the center of the rolling mill as the origin of the coordinate system; and n is selected as any positive integer not less than 3.