The invention discloses a predacious diving beetle breeding site which comprises a
paddy field planting area 1, an annular
ditch 2, an anti-escape shed 3 and a
ridge 4. The
paddy field planting area 1has the area of 300-1000 m<2>, the annular
ditch 2 is 0.5-1.0 m wide and 0.3-0.5 m deep, the anti-escape shed 3 is 3.2-3.7 m high, and the
ridge 4 is 1-2 m wide and 0.5-0.8 m high. The invention further discloses a predacious diving beetle breeding method. The method includes the steps of establishing the predacious diving beetle breeding site, cleaning the annular
ditch, conducting disinfecting,water injecting and
fertilizer applying and planting aquatic plants in the beginning of April,
stocking breeding predacious diving beetles in the last ten days of April, conducting plowing in the last ten days of May, planting rice seedlings in the beginning of June, putting the breeding predacious diving beetles in the annular ditch and then starting to feed the breeding predacious diving beetles, and regularly changing water. The traditional
paddy field planting mode is changed, and the comprehensive productivity level of a paddy field is improved; the predacious diving beetles stocked in the paddy field have weeding, pest removing and
fertility increasing effects, production cost is saved,
water quality conditions are improved, and
pollution is reduced.