Springing measurement method for long-span template

The invention discloses a springing measurement method for a long-span template. The method comprises the following steps: S1, symmetrically erecting positioning rods (1) on the upper surface of a template to be measured (3); S2, pulling a horizontal through long line (2) between the two positioning rods (1), wherein the horizontal through long line (2) is higher than the template to be measured (3), and a vertical distance between the ends of the horizontal through long line (2) and the upper surface of the template to be measured (3) is set as h1; S3, measuring a vertical distance between the middle point of the horizontal through long line (2) and the upper surface of the template to be measured (3), which is set as h2; S4, calculating a springing height S, wherein a calculation formulaof the springing height S is S = h1-h2; and S5, judging springing is accurate or not, determining that the springing is accurate if the springing height S is equal to a preset springing height, and if the springing height S