The invention discloses a time control method for attitude planning in dynamic imaging. A global position system(GPS) second pulse is adopted to calculate a reception time of the GPS second pulse after time latching, and system time-shift is calculated by using GPS full-second time transmitted by a data management subsystem or a housekeeping subsystem so as to compensate an absolute time-revise in the current cycle. Meanwhile, a PI control algorithm is used for making the shift error to gradually converge to an accurate value. In a non-second pulse time-revise cycle, the system compensates periodically according to time-shift compensation values which are evenly distributed in each cycle, that is to say, the uniform time-revise function of the subsystem can be achieved according to the 1/8 of the time-shift compensation values when the control cycle is 125ms. In the dynamic imaging processing, the system automatically stops introducing the GPS time-revise function in order to prevent attitude fluctuation caused by time-revise adjustment, and the PI control algorithm is applied to obtain a convergent accurate value as the time compensation during the task so as to complete the high-precision control of the system.