Abstract: According to the characteristics of Hailaer Oilfield in Inner Mongolia, the combination technology of perforation+ fracture+jet is applied. The special hydraulic jet pump, transduction cup and big bore fracture packer fitting for fracture technology are designed while optimizing the perforation parameters. The technology combining the strong suit of perforation, fracture, and hydraulic jet pump fit for the low natural energy formation of Hailaer Oilfield which needs fracture and unloading in time. Field application shows that the technology not only shortens operation period, also favorable for the protection of the formation, correctly getting the formation deliverability, and meeting the requirement of production.