The invention discloses an exploiting method for a working face to pass through cross and complex small coalpit tunnels. An arrangement direction of the working face is adjusted manually according to the following steps: the arrangement direction is adjusted 30 meters away from the small coalpit, a tail propels in advance, the tail supports scraper conveyers, and a head does not support scraper conveyers; the head and the tail propel simultaneously, but the head propels in advance, so that the arrangement direction of the working face is changed again; when the small coalpit is nearly exposed during propelling, the working face is leveled, an expansion anchor pole is anchored to a coal wall. The method can effectively prevent generation of roof fall accidents near the small coalpit, so that production inconvenience due to working face coal wall caving is eliminated. Safety and high efficiency of production environment on the working face which passes through the small coalpit is guaranteed.