The invention relates to the technical field of mobile phone protective film production, in particular to a seamless printing technology which comprises the following steps: 1, manufacturing a seamless screen: adopting circular silk screen material made of pure metal through the electroforming method, wherein a gap or joint does not exist in the circular silk screen body, so that the pattern of the circular silk screen form a closed curve to ensure that a crack or gap is not formed between the patterns during the printing process; and 2, printing the seamless pattern. According to the seamlessprinting technology, a rotating type screen printer is cooperated with an LEDUV light curing machine to realize continuous seamless printing to lines of a graph-text, so that film waste is reduced, and the printing efficiency is improved.