The utility model discloses an automatic change earthworm cultivation device, including cultivation platform and culture plate (10), cultivation platform comprises crossbeam (1), stand (2) and horizontal pole (3), and place on the shelf of horizontal pole (3) and crossbeam (1) component one row culture plate (10), crossbeam (1) top attachment rail (4), and scraper blade (9) are installed on setting up way in orbit (4) to scraper blade dolly (6) and harrow board dolly on scraper blade dolly (6), install one row of vertical pole on the harrow board dolly. Through this device, the realization to the earthworm earthworm cast layer among one row of culture plate that can be continuous is peeled off, can also be according to the height of the altitude mixture control scraper blade on earthworm cast layer.