The invention relates to a time slot allocation method for periodic data collection, and relates to the satellite resource management and distribution technology based on a CDMA satellite communication network in the field of satellite communication. The time slot allocation method can be applied to the CDMA communication network for periodic data to effectively improve the automatic management degree and the utilization efficiency of the resources. The time slot allocation method comprises the following steps: modeling satellite resources; designing a data collection request cycle; defining grading; and performing time slot resource allocation and time slot resource recovery. The time slot allocation method provides technical support for a data collection satellite communication system torealize a unified and automated resource management target.