Method and terminal for selecting service node in distributed network environment

The invention discloses a method and a terminal for selecting a service node in a distributed network environment. The method includes the steps that: the terminal obtains a service node list from an access server, and sends a pre-service request packet to each service node according to the service node list, wherein each pre-service request packet includes request resource information of the terminal; and the terminal screens data packets returned by all service nodes to obtain a needed service node to serve as the final service provider, and to send a formal service request to the final service provider. In the distributed network environment, the method and device can take the actual service load and network performance as a base, and determine the suitable service node according to a certain screen method, and thereby reduces errors of concentrated judgment of load balancing equipment.