Oil development is with mechanical filter core device, it relates to oil exploitation equipment technical field, it contains filter core body, mistake water hole, filter screen, goes up gland, lower gland, pull rod, overcoat, screw, colating hole, the filter core body on the equipartition have a plurality of water holes of crossing, the periphery cover of filter core body is equipped with the filter screen, the upper and lower both ends of filter screen respectively through last gland with the gland is fixed with the filter core body down, the inboard of filter screen is provided with severalpull rods, the both ends of pull rod respectively with last gland with the gland is fixed down, the periphery of filter screen be provided with the overcoat, the both ends of overcoat pass through thescrew respectively with last gland with the gland is fixed down, the equipartition has a plurality of colating holes on the overcoat. Oil development is with mechanical filter core device, when keeping the water injection flow, improved the bearing strength of filter core, the reliability reinforcing, the live time is 3 times of traditional filter core, changes filter screen convenient and fast,has reduced workman's intensity of labour, can effectively practice thrift the cost input of filter core.