The invention discloses a device for detecting a reverse hose. The device is arranged in hose filling equipment, is used for identifying reverse hoses before hoses are put into filling positions, and mainly comprises a support, a detecting air cylinder, detecting head components and detecting electric eyes, wherein each detecting head component mainly comprises a detecting head, a detecting rod, and an induction block. During the use, when the hose reverses, each detecting head touches a hose cap to lift each detecting rod, each induction block positioned on the detecting rod triggers each detecting electric eye because the induction block is lifted, and each detecting electric eye immediately sends out a signal to the equipment to enable the equipment to get the information of the existing of a reverse product and send out a processing instruction. In case that the technical scheme of the invention is put into practice, the reverse hoses can be identified before the hoses are put into the filling positions, so that the phenomenon that materials spill over to cause contamination and waste can be prevented, and the utilization rate and the production efficiency of the equipment can be increased.