The utility model discloses a microballon ground recovery unit in pit, it includes: tee bend no. 1, tee bend no. 2, a passageway, B passageway and recovery unit, the left end of tee bend no. 1 is usedfor the intercommunication with well head rotating control head, the right -hand member of tee bend no. 1 with a passageway intercommunication, the lower extreme of tee bend no. 1 with B passageway intercommunication, the left end of tee bend no. 2 with a passageway intercommunication, the lower extreme of tee bend no. 2 with B passageway intercommunication, the right -hand member of tee bend no.2 is used for communicateing with choke manifold, a passageway middle part be provided with stop valve no. 1, the both ends of the B passageway middle part that is equipped with stop valve no. 2 andstop valve three, B passageway respectively be provided with recovery unit. Adopt the utility model discloses, block up the passageway when having avoided the microballon to pass through surface equipment such as choke manifold, separator, cause and suppress the pressure, arouse that the condition of well control risk takes place.