The present invention discloses a policy sending method and system for Machine Type Communication (MTC). The method includes: a policy implementation body establishes a Diameter connection between it and a Policy and Charging Rules Function (PCRF) for the IP-Connectivity Access Network (IP-CAN) sessions established by all the MTC devices in the same MTC device group; and the PCRF sends the policies made for the MTC devices in the MTC device group to the policy implementation body via the Diameter connection. The present invention can avoid the waste of the network resources, and improve the utilization ratio of the network resources.