The invention relates to a service implementation method and device, computer equipment and a storage medium. The service implementation method includes: in the running process of the first service implementation class, when the first service implementation class needs to call a second service implementation class, obtaining a query field, wherein the query field comprises a target query parameterattribute name, service implementation class indication information and a service implementation class method name; obtaining a query parameter according to the target query parameter attribute namein the query field; when the service implementation class indication information is a service implementation class name, obtaining an object of the second service implementation class according to theservice implementation class name; and finally, performing querying according to the query parameter, the object of the second service implementation class and the service implementation class methodindicated by the service implementation class method name to obtain a return value. According to the service implementation method provided by the invention, the dependency relationship between service implementation classes can be reduced, the coupling degree between codes is reduced, and the maintenance cost is further reduced.