The invention belongs to the technical field of functional microbiological screening and application, and particularly relates to calcium carbonate producing actinomycetes and application thereof. The calcium carbonate producing actinomycetes is brevibacterium linens BS258, a strain is preserved in the Common Microorganism Center of the China Committee for Culture Collection of Microorganisms in Number 3 (the Institute of Microbiology) of the Number 1 courtyard on the West Beichen Road in the Chaoyang District of Beijing on September 26th, 2016, a preservation number of the strain is CGMCC 1.15904, and a taxonomy name of the strain is brevibacterium linens BS258. The calcium carbonate producing actinomycetes and the application have the advantages that calcium carbonate precipitates can be induced by the actinomycetes, and the strain can tolerate high-calcium-ion environments and can resist diversified heavy metal ions; calcium ions in the environments can be induced under the effect of carbonic anhydrase by the aid of alkaline micro-environments generated in urea decomposition procedures to form the calcium carbonate precipitates, the heavy metal ions can be co-precipitated in calcium carbonate forming procedures, accordingly, the purposes of biological mineralization and heavy metal restoration can be achieved, and the shortcomings in the prior art can be overcome.