The invention discloses a laser string with an interaction effect. The laser string comprises a mounting base and two calibration mechanisms, wherein an outer wall of the mounting base is symmetrically provided with arc-shaped mounting grooves, inner cavities of the two arc-shaped mounting grooves are both provided with U-shaped mounting rings, two calibration mechanisms are symmetrically arranged on the two sides of the mounting base, each calibration mechanism comprises a threaded hole, a telescopic hole is formed in one side of the inner wall of the threaded hole, a calibration hole is formed in one side of the U-shaped mounting ring, an inner cavity of the threaded hole is in threaded connection with a threaded rod, and one end of the threaded rod is rotationally connected with a calibration rod. Through the arrangement of the threaded hole, the threaded rod, the telescopic hole, the calibration hole and the calibration rod, the threaded rod in the threaded hole is rotated, so the calibration rod is driven to move in the telescopic hole and be inserted into the calibration hole, the alignment work of the two U-shaped mounting rings is completed, and meanwhile, the work that a laser emits light beams to be aligned with a photoelectric receiver is completed; and precision of laser string installation is improved.