Species diversity and community structure of animals top soil and in the soil. The learning and development center of mangrove forest 3 Khanom, Nakhon Si Thammarat province by samples of 1 times. In March 2559 in water down the minimum 1.5 meters. The benthic soil and all 15 family 18 type, which the shells 11 family 13 species group 2 family 3 crab type the clamworm 1 families. And the fish 1 family 1 type. To consider a part in the body. The shells were found the group 77 group (group 18 crab earthworm and sea fish were per cent 4 1 respectively, and diversity index (Shanon-Wiener index) by considering the benthos and in soil. This area is quite low. The values in each area, an area that 1 was 1.734 area 2 was 1.851 area and area 3 was 1.538 species top soil and in the soil. The dominant species, including shellfish pinhead (Assiminea brevicula) clams (Meretrix spp). Mud crabs (Paracleistostoma Eriophorum) and earthworm sea. (Polychaeta) distribution of animals and in the soil with depth is found in depth 10 cm. The distribution of benthic species and soil rather than in depth 20 cm. The view from the species in depth. Which in the depths are benthic animals and soils, including shellfish gram (Clithon oualaniense) shell piece (Babylonia spirata) pay respect. (Telescopium Telescopium) crab (Episesarma spp.) crabs keys (Varnan YUI) shells chupchaeng (Cerithidea obtusa) shells (Stenothyra sp.). And the mudskipper (Periophthalmodon novemradiatus). Benthic community structure and community structure of soil animal soil and effect of soil analysis had the similarities in the 1 area and area 2 and difference of benthic animals in the soil and the 3 area in the center of learning and development of mangrove forest 3 fur district. , Nakhon Si Thammarat province.