The present invention provides a multifunctional power cable connector. The connector comprises a sealing gasket, a first protective cover, a seal groove, a second protective cover, outer threads, a positioning groove, a positioning block, a locking sleeve and a cable core, wherein the sealing gasket is fixed at an outer end of the first protective cover, the seal groove is arranged at an outer end of the second protective cover, the outer threads are arranged at the upper part of the first protective cover or the second protective cover, the positioning groove is arranged at an inner side of the end part of the first protective cover and comprises a retaining ditch, the retaining ditch is arranged at the inside of the positioning groove, the positioning block is fixed at an outer side of the end part of the second protective cover and comprises a retaining hook, and the retaining hook is arranged at the end part of the positioning block. Through arrangement of the first protective cover, the second protective cover, the locking sleeve, the sealing gasket and an insulation adhesive layer, the insulation class of the power cable connector is raised, the waterproof performance is excellent, power supply safety in a humid environment is guaranteed, and the connector is excellent in fire resistance, simple in structure, convenient to operate, time and labor saving, and convenient to popularize and use.