The invention relates to a low-pressure energy-saving water-saving reverse osmosis mineralized direct-drinking healthy water device, which is achieved by comprising a raw water pre-filtering treatment device, a high-pressure pump 6 connected with the pre-filtering treatment device, and a reverse osmosis filter 7 connected with the high-pressure pump 6, wherein the reverse osmosis filter 7 is connected with a multi-micro mineralization device 8, an ozone generator 9 and a gas-liquid mixer 10, and the finally produced water is direct-drinking mineral water stored in a mineral water tank 11. The pre-filtering treatment device comprises a quartz sand filter 1, an active carbon filter 3, a softening filter 4 and a precision filter 5. Compared with the prior art, the device has the characteristics of less waste water and large consumption reduction, and the concentrated water discharge is only 1/5 of that in the conventional mode; and a high-pressure membrane of a commensuration pump needs a pressure of between 15 and 25 MPa, and a low-pressure membrane only needs a pressure of between 6 and 10 MPa, which are nearly 1/3 of that in the conventional mode. Besides, the produced mineral water has good water quality and can be drunk directly.