The utility model discloses a sampling device technical field's a sampling device for petroleum geology exploration, including first branch, the top and the bottom of first branch all are connected with the slide rail, the outer wall of first branch has cup jointed the slip cap, the slip cap cup joints on two sets of slide rails, the mounting is installed at the top of slip cap, peg graft and have positioning bolt in the top of mounting, the left end of first branch has the crotch through the round pin hub connection, the outer wall of crotch has the connecting rod through the round pin hub connection, the right -hand member of connecting rod is connected with the bottom of slip cap through the round pin axle, the bottom of crotch is connected with broken head, and this a sampling device for petroleum geology exploration has a multi -purpose function, has alleviateed the weight of explorer's belongings, and one multi -purpose, practices thrift the cost.