The invention relates to selenium-enriched needle mushrooms and a production method thereof. The preparation method comprises the steps that 1, filler is prepared, wherein raw materials, including corncob, cottonseed hulls, sugar beet pulp, shell powder, rice bran, bran, corn flour and selenium-enriched additive, are prepared in the weight proportion of 550:145:130:50:880:165:63:500, stirred and mixed, water is added under the stirring condition, and wet stirring continues; 2, bottling is carried out; 3, sterilizing is carried out; 4, cooling is performed; 5, inoculation is performed; 6, cultivation is carried out for 19-21 days, wherein cultivation is divided into a first stage and a second stage, environment conditions of a growth chamber are controlled, and the cultivation process further comprises the steps of scratching and insertion; 7, harvesting and packaging are carried out. The invention further provides the selenium-enriched needle mushrooms produced through the method. According to the method, the selenium raw materials are added into the needle mushroom planting technology and achieve enrichment in needle mushrooms, so that the problem of selenium deficiency in existing nutrition intake is solved.