Method for leakage pre-plugging of well cemented through lining pipe

The invention relates to the technical field of oilfield lining pipe reinforcing operation, in particular to a method for leakage pre-plugging of a well cemented through a lining pipe. The method comprises the following steps that 1, a drill rod is tripped to 30-50 m of the upper portion of a perforation interval or a sleeve leakage point, and a packer is arranged on the position with 80-120 m distance from the upper portion of the perforation interval or the sleeve leakage point; 2, well flushing fluid is positively injected for one week, and then the packer is set; and 3, a plugging agent Ais injected to plug the perforation interval or the sleeve leakage point in advance, and the plugging agent A is composed of a water-based drive-adjusting reagent, a lignin particle plugging agent andwater. According to the method, before well cementing construction, chemical agents are injected to pre-plug the well sections, with cement slurry prone to loss, of the perforation interval, a leakage loss point, the sleeve l