The utility model discloses a gas -liquid distributor, this gas -liquid distributor include bubble cap and the downtake that is located this bubble cap below, and this downtake includes upper segment pipe and the hypomere pipe that is located upper segment pipe below, be fixed with on the upper segment pipe the bubble cap, the hypomere is effective on installing the break plate, the inner wall of bubble cap with be formed with the annulus between the outer wall of upper segment pipe, wherein, still be provided with gas injection portion on the inner wall of upper segment pipe, be formed with in this gas injection portion the aperture from last to diminish gradually earlier down after gradually the gaseous phase of grow spray the orifice, be formed with liquid drainage hole on the hypomere pipe. Consequently, liquid need not carried by gas, but is aspirated to the inside of downtake through liquid drainage mouth through the pressure differential of the inside and outside side of downtake to the operating flexibility that the messenger brings about the desired sensation, liquid is double -phase is high, is applicable to the circumstances of low gaseous phase load, and is adapted to big, the mobile poor liquid medium of viscosity.