The utility model relates to the field of machinary, the concretely relates to contact box. 550 contact box for cabinet with go up lower contact, including a contact box box body, the contact box box body includes tip, and lower tip is pipe form, and the upper surface of lower tip is equipped with 5 strip archs, article five, the protruding first strip including arranging in proper order of strip is protruding, the second strip is protruding, the third strip is protruding, the fourth strip is protruding, the 5th strip is protruding, the bellied top of third strip, one side is equipped with the turn -ups at least, and turn down rims width is at 10mm~20mm. The utility model discloses a setting up the protruding upper surface of tip extremely down of 5 strips, optimizing the bellied structure of strip, it increases effective creepage distance to have guaranteed in the time of reduce cost, has improved the security. In addition, at the bellied top of third strip, at least one side is equipped with the turn -ups, under the unchangeable basically prerequisite of cost and volume, has prolonged creepage distance greatly.