Electronic flexible rule capable of displaying variable quantity and measurement method thereof

The invention discloses an electronic flexible rule capable of displaying variable quantity and a measurement method thereof. The electronic flexible rule comprises a flexible rule body, wherein a circuit board is arranged in the flexible rule body and is in circuit connection with a display screen which is arranged on the surface of the flexible rule body. When the display screen is electrified and used for measuring, the current measurement value is recorded and saved; the current measurement value is compared with a target value; and the comparison result can be displayed. The electronic flexible rule is capable of obtaining the current measurement value and comparing the current measurement value with the target value to obtain the comparison result, so that the user can measure the current measurement value and know the variation change; the variable quantity measuring function is added.