The invention relates to an ethylene polymerization catalyst containing an ether compound, a preparation method thereof, and an application thereof. The method comprises steps that: (1) a magnesium halide compound and a titanic acid ester compound are subject to a reaction, such that a solution is formed, wherein the titanic acid ester compound is controlled at 1.0 to 10mol relative to each mole of magnesium halide, and a reaction temperature is 120 to 200 DEG C; (2) the formed solution is mixed with an ether compound, wherein the ether compound is controlled at 0.01 to 20mol, and a mixing temperature is 0 to 150 DEG C; (3) the mixed solution obtained in the step (3) is subject to a contact reaction with a chlorine-containing compound, such that a precipitate is obtained, and the catalyst is obtained, wherein the chlorine-containing compound is controlled at 0.5 to 50mol, and a temperature is controlled at 0 to 100 DEG C. The prepared catalyst particles are advantaged in good appearances, uniform particle-size distribution, good hydrogen modulation sensibility, and low polymerization product refinement content, such that the catalyst can be used in gas-phase and slurry polymerization process equipments.