The invention discloses a technology for carrying out fungus growing on loose tea. The technology comprises the following steps: (1) preparing a fermenting agent, namely, separating out eurotium cristatum from fuzhuan tea, and preparing to obtain the solid pure strain fermenting agent; (2) treating raw dark green tea raw material, namely, removing the impurities in the raw dark green tea, steaming, carrying out pile fermentation and then feeding tea juice; (3) carrying out steaming inoculation and fungus growing, namely, steaming the raw dark green tea with the tea juice, then immediately feeding the solid pure strain fermenting agent and inoculating; after that, putting the inoculated raw dark green tea into a fungus growing culture room, and carrying out fungus growing culture; and (4) drying and packaging, namely, drying after fungus growing, and directly packaging the dried loose tea. After the technology is adopted, the fungus growing time is shortened, the bacterial pollution rate can be reduced in the fungus growing process of the loose tea, the problems that the existing loose tea is hard in fungus growing and easy in bacterial growth can be solved, the fungus growing rate of the loose tea reaches up to 100%, and the tea is widespread in golden flowers on the surface and the granules are plump.