The invention provides sea pebble, sea sand, seawater and regenerated micro-powder concrete which comprises the following components in percentage by weight: 7-25% of cement; 0-7.5% of regenerated micro-powder; 0-55% of sea pebble; 0-55% of regenerated broken stone; 20-25% of sea sand; 5-7.5% of seawater; 0-2% of plant fibers; and 0-0.2% of a water reducing agent. The invention further provides apreparation method of the sea pebble, sea sand, seawater and regenerated micro-powder concrete. According to the preparation method of the sea pebble, sea sand, seawater and regenerated micro-powder concrete provided by the invention, resource utilization is carried out on the sea pebbles, the regenerated gravels, the sea sand, the seawater and the regenerated micro-powder, so that the problems ofresource consumption, environmental pollution and the like in concrete production and after scrapping are solved; and the tensile strength and toughness of the sea pebble, sea sand, seawater and regenerated micro-powder concrete are improved through the plant fibers.