The invention belongs to the technical field of fasteners, and relates to a double-headed ratchet wrench. The double-headed ratchet wrench is characterized in that a ratchet is a double-headed ratchet (2), and the double-headed ratchet wrench further comprises a second pawl assembly which is composed of a second pawl (7), a second spring (8) and a second spring seat (9). According to the double-headed ratchet wrench provided by the invention, the slipping phenomenon occurring under the nut looseness condition can be effectively prevented, and a nut can be dismounted and mounted conveniently in a narrow space where a hand cannot stretch.