Integral reinforced concrete precasting manure pit

The utility model discloses an integral septic tank precast by reinforced concrete, which relates to an auxiliary facility of the construction engineering. A base, tank bodies with variable diameters and a tank cover are manufactured individually; the tank bodies adopt an integral structure; the tank bodies, a sewage inlet, intercommunicating pores and a sewage draining outlet are processed and shaped once in a mould; the tank bodies are serially connected through the intercommunicating pores. The tank bodies of the septic tank adopt the integral structure to simplify the process steps of manufacture and installation. The utility model has the advantages of labor saving, time saving, good pressure resistance, long service life and low production cost. The problem that feces liquid leaks out because the sealing of live knots of separate tank bodies is not tight is solved.