Highly waterproof and highly insulative simple injection-molded integrated lamp string without conventional lamp holder and manufacturing process thererof

An injection-molded integrated lamp string, comprising:

• a power line and several lamp bulbs spaced apart on the power line, wherein the power line comprises a positive pole power line and a negative pole power line, the lamp bulb comprises a lampshade, a lamp core body and at least one insulation plastic piece, the lampshade is provided with an insertion portion, the lamp core body is inserted into the insertion portion and protruded into the lampshade, the lamp core body is provided with at least one LED lamp filament, both ends of the LED lamp filament are connected with a positive pole conductive wire and a negative pole conductive wire, the positive pole conductive wire is in electrical connection with the positive pole power line, the negative pole conductive wire is in electrical connection with the negative pole power line, so as to form a semi-finished lamp bulb;
• the semi-finished lamp bulb, the positive pole conductive wire, the negative pole conductive wire are integrally connected with the power line through injection molding, and an injection plastic fusion body and the semi-finished lamp bulb are fused integrally through a mold to form a sealing insulation plastic head.