The invention discloses a satellite instruction sequence processing method and a satellite instruction sequence processing device based on multiple tasks. The method comprises the following steps that 1, all indirect instructions which are needed by remote control instruction tasks are obtained; 2, all the indirect instructions are encapsulated in the format of injection data with a corresponding amount to form an instruction sequence according to the maximum encapsulation value of each piece of injection data, wherein the instruction sequence comprises at least one instruction task; 3, all injection data in the instruction sequence are sent. According to the device and the method, the ground operation times are greatly reduced, the operation flow is simplified, the man-made misoperation is reduced, the reliability, the safety and the usability of the remote control operation are effectively improved; meanwhile, the ground operation time is shortened, the occupancy of the remote control resource is reduced, and the remote control efficiency is improved.