The utility model provides an antenna for a nuclear magnetic resonance fluid analyzer. The device comprises a coil support, a first solenoid coil and a second solenoid coil, the coil support is a cylinder with one sealed end and is coaxially arranged outside a sample tube of the nuclear magnetic resonance fluid analyzer in a sleeving mode, and the unsealed end of the coil support is connected witha center round hole of a non-magnetic sealing plate of the nuclear magnetic resonance fluid analyzer; the first solenoid coil sleeves one end, far away from the non-magnetic sealing plate, of the coil bracket; and the second solenoid coil sleeves one end, close to the non-magnetic sealing plate, of the coil bracket. According to the utility model, on-line measurement of component analysis parameters of static fluid and flow velocity of flowing fluid can be realized.