The invention discloses route releasing method and equipment based on a distributive data center. The method includes the steps that gateway equipment maintains an ARP table, and IP addresses are recorded in the ARP table; the gateway equipment determines a network segment which needs a host engine to be released, excludes a port list, screens the IP addresses located in the network segment in the ARP table by means of the network segment and determines outlet ports corresponding to the IP addresses located in the network segment; when the outlet ports corresponding to the IP addresses located in the network segment are not in the excluded port list, and the IP addresses located in the network segment are added to a DHR table; the gateway equipment obtains the IP addresses from the DHR table and releases the IP addresses to an external network in the host engine mode. According to the route releasing method and equipment, complication of manual configuration is eliminated, configuration is simplified, meanwhile, detection messages in the data center are reduced greatly and a network bandwidth is saved.