NOVELTY - Method for purifying solid waste in a sea cucumber factory seedling protecting-cultivating pool using clam worms involves laying substrate in the sea cucumber factory seedling protecting-cultivating pool, adding clam worm offspring seeds to the substrate, inoculating compound microorganisms in the cultivating pool and effective microorganism bacteria in sea water, measuring the ammonia nitrogen concentration of the water body in the cultivating pool, drying the substrate in the pool for 5-7 days, and harvesting the clam worms using labor digging and catching process.    USE - The method is useful for purifying solid waste in a sea cucumber factory seedling protecting-cultivating pool (claimed).    DETAILED DESCRIPTION - Method for purifying solid waste in a sea cucumber factory seedling protecting-cultivating pool using clam worms involves laying substrate in the sea cucumber factory seedling protecting-cultivating pool, where the substrate is fine sand with diameter of 0.1-1 mm, and the thickness of the laying is 10-20 cm, adding clam worm offspring seeds with specification of 1-3 cm/seed to the substrate, inoculating compound microorganisms in the cultivating pool and effective microorganism (EM) bacteria in sea water, where the cell concentration is the number of beneficial microorganisms contained per ml which is not less than 10 million, and the inoculation density is 5 parts per million (ppm) at intervals of 1-3 weeks, measuring the ammonia nitrogen concentration of the water body in the cultivating pool, if the ammonia nitrogen concentration is greater than 0.1 mg/l, inoculating compound microorganisms in the whole cultivating pool by even splashing in a scooping mode, where the inoculation density is 3-10 ppm, every month, measuring the ammonia nitrogen concentration of interstitial water in the fine sand at the bottom of the cultivating pool, if the ammonia nitrogen concentration of the interstitial water is greater than 1 mg/l, draining water in the pool, drying the substrate in the pool for 5-7 days, and harvesting the clam worms using labor digging and catching process.