The invention discloses a red date selenium enriching method which is characterized in that a fertilizing method comprises the following steps: from the flowering period to the young fruit period of red dates, applying 1:2000 times of solution of a Na2SeO3 fertilizer to soli; in the young fruit period, injecting 1:100 to 200 times of solution of Na2SeO3 to stalks; and when the red dates enter a fruit expansion period, spraying the 1:100 to 200 times of solution of the Na2SeO3 fertilizer or 1:300 to 350 times of solution of an organic selenium fertilizer to leaf surfaces, spraying once every 15 days, and continuously spraying for 3 times. The content of red date selenium sprayed twice in the young fruit period and the fruit expansion period can reach 198.793 to 234.245mug/kg, and the red date selenium content reaches a nationally specified selenium-enriched food standard and is about to reach a national food selenium-enriched standard, and the purposes of selenium enrichment, safety and healthcare are achieved for the produced selenium-enriched red dates.