Abstract: Based on intelligent laser scanning, birefringence effect and electro-optic effect, a scanner for arbitrary scanning in 8 rows is proposed. It mainly consists of a three-order electro-optic deflector and a 81 cascade electro-optic prism group. The three-order electro-optic deflector is composed of three electrooptic shutters and three birefringent crystal plates. The laser beams are switched between rows by controlling half-wave voltage of crystal. The prism group with cascade prisms of optic-axis reciprocatingly scans rows by applied electrical field. Digital or continuous scanning were realized by changing the properties of the applied electrical field. A laser scanner with 17.256 scanning area and 5.822KV maximal voltage was designed by using the cascade electro-optic deflector of trapezium structure. It scans arbitrarily in 8 rows using on-line operation.