The invention discloses a two-fluid-process grouting plug and a grouting method using the same and belongs to grouting devices and grouting methods in hydropower construction projects. The two-fluid-process grouting plug comprises a grout inlet pipe, a pressure gage and a valve. The key technique includes that the two-fluid-process grouting plug further comprises an additive pipe. The bottom of the additive pipe is a floral pipe. The grout inlet pipe and the additive pipe share the same sleeve pipe. An observation hole is formed in the upper end of the sleeve pipe. The grout inlet end of the grout inlet pipe is connected with a grout return pipe. The two-fluid-process grouting plug and the grouting method using the same have the advantages that the two-fluid-process grouting plug is adopted to achieve grouting aiming at all hole sections with high repeated grouting frequency in a grouting process, spread of cement grout is effectively controlled, repeated grouting frequency is obviously reduced, time for solidification of the grout is adjusted to 6-12 hours from original 12-24 hours, construction progress is improved, investment outlay is effectively reduced, construction period which is delayed due to objective reasons such as geology is compensated, and foundation is laid to realizing purpose of the whole construction period.