The invention discloses a selenium-containing fertilizer for vegetable crop planting and a preparation method therefor. The selenium-containing fertilizer for vegetable crop planting comprises the following ingredients in parts by mass: 25-40 parts of tea meal, 5-10 parts of calcium phosphate, 8-15 parts of selenium-containing bean stalk powder, 20-35 parts of photosynthetic bacterium solution, 10-15 parts of chicken bone meal, 20-30 parts of soybean meal, 3-5 parts of fish scale meal, 2-4 parts of bacillus subtilis, 1-5 parts of polypeptides, 1-3 parts of chelant and 30-50 parts of faecal manure hydrolyzate. According to the selenium-containing fertilizer for vegetable crop planting and the preparation method therefor, the tea meal, the calcium phosphate, the selenium-containing bean stalk powder, the photosynthetic bacterium solution, the chicken bone meal, the soybean meal, the fish scale meal, the bacillus subtilis, the polypeptides, the chelant and the faecal manure hydrolyzate serve as raw materials; when the prepared selenium-containing fertilizer for vegetable crop planting is applied, the increase of growth speed of vegetable crops is facilitated, the nutritive value of the vegetable crops is increased, and the selenium-containing fertilizer also can play a certain role in inhibiting insect pests; and the source of raw materials is wide, the cost is low, and thus, theselenium-containing fertilizer is an environment-friendly fertilizer.