Ram blowout preventer low in material consumption and easy to maintain

The utility model relates to a flashboard blowout preventer with low material consumption and easy maintenance, which belongs to the technical field of blowout preventers and comprises a shell, a guide plate and a gate plate, an oil through hole is formed in the shell, a closed hole communicated with the oil through hole is formed in the side surface of the shell, and a groove is formed in the inner side wall, corresponding to the lower part of the shell, of the closed hole; the guide plate is arranged in the groove, and the top face of the guide plate is sequentially divided into a first guide plane section, a guide inclined plane section and a second guide plane section in the direction from the position close to the oil through hole to the position away from the oil through hole. The first guide plane section is higher than the second guide plane section, and the guide inclined plane section is inclined downwards from the first guide plane section to the second guide plane section; and the bottom surface o