A method, apparatus, device and computer storage medium for determining a source channel are disclosed. A specific implementation solution is as follows: determining an interval between a time when an application is opened for the first time and an installation time of the application; if the interval exceeds a preset duration threshold, determining a source channel of the application according to channel information carried by an installation package of the application; if the interval does not exceed the preset duration threshold, determining the source channel of the application according to channel information transferred to the application when the application is opened for the first time. The present disclosure can improve the accuracy of the source channel of the application.