Method for collecting earthworms by utilizing sasangua cake solution

The invention discloses a method for collecting earthworms by utilizing sasangua cake solution, aiming to provide a method for collecting earthworms with the characteristics of no residual contamination, environmental friendliness, good sampling results, and stable sampling efficiency. The method comprises the following steps: (a): the preparation of the sasangua cake solution is as follows: sasangua cake powder is added into water in ratio of 1:3 by weight, the mixture is boiled by boiling water for 0.5-2 hours, and then is filtered to obtain sasangua cake filtered fluid, the obtained sasangua cake filtered fluid is added into water in ratio of 1:5-9 by weight to prepare the sasangua cake solution; (b): the sasangua cake solution is evenly sprayed on soil samples, with 5-9 litres of the sasangua cake solution on 0.25 square meters, to collect earthworms climbing out. The method is particularly suitable for collecting earthworms in ecological farms, conservation district, or soil region into which ground wate