Line snapping-free pay-off device for secondary structure masonry

The utility model provides a line-snapping-free pay-off device for secondary structure masonry. The line-snapping-free pay-off device comprises a fixed rod piece, a movable rod piece and a movable rod piece, the clamping assembly is arranged on the fixing rod piece and used for being clamped and fixed to the structural beam so as to fix the fixing rod piece; the movable supporting assembly is adjustably arranged on the fixed rod piece in the length direction of the fixed rod piece; and the laser gradienter is arranged on the movable supporting assembly and used for emitting laser rays to achieve paying off. The device provided by the utility model consumes less time in the mounting process, is stably fixed on a structural beam, and does not cause the situation that the perpendicularity and the flatness of the whole wall surface are influenced due to substandard precision caused by collision in the construction process, so that the percent of pass of finished products can be better highlighted, and the product