Holding temperature and holding thickness are main parameters for two-phase controlled rolling on platemill . The opti mization of holding temperature and holding thickness for pass schedule calculation of two-phasecontrolled rolling on plate mill was presented and its feature is as follows :(1) Determination of holding thicknesscan be automatically obtained based on the influence of mill safetyli mits ,tracking zone length and holding ti me onholding thickness ;(2) Determination of holding temperature can be automatically obtained and the holding ti mecan be reduced as much as possible ;(3) Algorithmcan modify the holding temperature and thickness depending onslab size and product size . Holding temperature and holding thickness are main parameters for two-phase controlled rolling on platemill. The opti mization of holding temperature and holding thickness for pass schedule calculation of two-phase controlled rolling on plate mill was presented and its feature is as follows: (1) Determination of holding temperature can be automatically obtained based on the influence of mill safetyli mits, tracking zone length and holding ti me onholding thickness; (2) Determination of holding temperature can be automatically obtained and holding ti mecan be reduced as much as possible; ( 3) Algorithmcan modify the holding temperature and thickness depending onslab size and product size.