The utility model discloses a portable distribution network automation pre -installation debugging proof box. The utility model discloses a most instrument that to need use the external switch cabinet all gui ji to the case lid, great reduction the quantity of instrument, make operating personnel ceaselessly the conversion equipment ware test the external switch cabinet, be equipped with various pilot lamps and button on the case lid, messenger operating personnel is when testing the external switch cabinet, whether can understand the external switch cabinet more directly perceived and fast in proper working order. 10 the existence of core socket makes the cable junction of the usefulness of being connected between case lid and the external switch cabinet, need not to use too much connecting wire for connection structure is more clear, operating personnel more quick convenience when connecting both. The existence of shallow make operating personnel the heavy box of transport seem during with the case lid more the relaxation with fast, the dead lever has played fixation cabinet's effect, avoid separation shallow.