Automated oil pressure material retaining device for open mill

The utility model discloses an automated oil pressure material retaining device for an open mill. The device comprises a bracket, locating seats, a guide mechanism, a sliding rod, push plates, a permanent seat and an oil cylinder, wherein the locating seats are arranged on the bracket; the guide mechanism is arranged on the locating seats; the sliding rod is in sliding fit with the guide mechanism; the push plates are arranged on the front end of the sliding rod; the permanent seat is arranged between the locating seats; the oil cylinder is fixed on the permanent seat; and the oil cylinder is connected with the push plate. The push plates can be pushed by the oil cylinder to perform the action on preventing rubber from leaking to two ends of a drum. The processing quality of the automated oil pressure material retaining device is good, and the product quality can be guaranteed. According to the material amount, distance between the two push plates is regulated, or distance between the two push plates is regul