The invention discloses a novel tea juice concentration method. The method includes the following steps of S1, preparation of raw materials, wherein tea components are extracted with hot water, a tea juice stock solution with the solid content of 0.8%-3% is obtained through at least one-time pre-filtration with a 300-500-mesh filter screen or a filter bag, and the tea juice stock solution with the set volume is put into a raw material tank; S2, preparation of a drawing liquid, wherein a salt solution or saccharide solution with the osmotic pressure greater than 3.5 Mpa is prepared into the drawing liquid, and the drawing liquid with the set volume is put into a drawing liquid tank; S3, concentration, wherein a raw material circulating pump is started to convey the stock solution into a forward osmosis membrane module, a drawing liquid circulating pump is started to convey the drawing liquid into the forward osmosis membrane module at the same time, the temperature is controlled at 10-30 DEG C, the pressure is controlled at 0-2 bar, the circulating flow rate of the stock solution is 20-120 L / h, the circulating flow rate of the drawing liquid is 10-50 L / h, and concentrated tea juice with the soluble solid concentration of 30-60% is obtained 40-120 minutes after running. According to the method, the tea juice is concentrated by utilizing a forward osmosis membrane technology, there is no external pressure for driving in the forward osmosis membrane concentration process, the energy consumption is small, the contamination degree of a membrane surface is small, and flavor substances and nutrient substances in the tea juice can be retained.