A multi-angle ratchet wheel screwdriver with a swivelling head, comprising: a grip handle, a spring, a press button, a drive head and a pivot joint member, wherein a connecting base extends from one end of the grip handle and is provided with a rotary slot, a first pivot hole and a recess are arranged at one side of the connecting base and communicating with the rotary slot, and the recess allowing the spring and the press button to be mounted therein, wherein the press button consists of a first end and a second end; an avoiding notch is formed on the bottom of the press button and arranged between the first end and the second end; two ends of the spring are abutting against the wall of the recess and the second end of the press button respectively after the spring and the press button being placed into the recess of the grip handle in a direction perpendicular to the longitudinal axis of the screwdriver, and wherein the drive head includes a main body; a connecting rod controlled by a ratchet member is arranged at the main body, wherein the pivot joint member is used in combination with a seal cover made of insulation material and all exposed metal parts of the grip handle, the press button and the drive head are coated with an insulation layer, so that the ratchet wheel screwdriver is completely insulated, the recess on the connecting base is located adjacent to the grip handle, wherein, when pressing the first end of the press button, the press button retracts, so that the avoiding notch thereof is aligned with the rotary slot, and a gear-like portion is disposed on one end of the main body of the drive head, which is different from the end from which the connecting rod is protruding, a blocking edge being connected to two adjacent teeth of the gear-like portion on one side and a second pivot hole is penetrating the center of the gear-like portion, the drive head being mounted into the rotary slot of the grip handle by means of the gear-like portion in such a way, that the second pivot hole of the gear-like portion remains facing the first pivot hole of the grip handle and the pivot joint member is inserted in the first and second pivot hole (13, 443), wherein the press button can be smoothly locked into a concave portion formed between the two adjacent teeth of the gear-like portion and abutting against the blocking edge, and the seal cover being placed over the first pivot hole of the grip handle to seal the pivot hole. wherein a connecting base extends from one end of the grip handle and is provided with a rotary slot, a first pivot hole and a recess are arranged at one side of the connecting base and communicating with the rotary slot, and the recess allowing the spring and the press button to be mounted therein, wherein the press button consists of a first end and a second end; an avoiding notch is formed on the bottom of the press button and arranged between the first end and the second end; two ends of the spring are abutting against the wall of the recess and the second end of the press button respectively after the spring and the press button being placed into the recess of the grip handle in a direction perpendicular to the longitudinal axis of the screwdriver, and wherein the drive head includes a main body; a connecting rod controlled by a ratchet member is arranged at the main body, wherein the pivot joint member is used in combination with a seal cover made of insulation material and all exposed metal parts of the grip handle, the press button and the drive head are coated with an insulation layer, so that the ratchet wheel screwdriver is completely insulated, the recess on the connecting base is located adjacent to the grip handle, wherein, when pressing the first end of the press button, the press button retracts, so that the avoiding notch thereof is aligned with the rotary slot, and a gear-like portion is disposed on one end of the main body of the drive head, which is different from the end from which the connecting rod is protruding, a blocking edge being connected to two adjacent teeth of the gear-like portion on one side and a second pivot hole is penetrating the center of the gear-like portion, the drive head being mounted into the rotary slot of the grip handle by means of the gear-like portion in such a way, that the second pivot hole of the gear-like portion remains facing the first pivot hole of the grip handle and the pivot joint member is inserted in the first and second pivot hole (13, 443), wherein the press button can be smoothly locked into a concave portion formed between the two adjacent teeth of the gear-like portion and abutting against the blocking edge, and the seal cover being placed over the first pivot hole of the grip handle to seal the pivot hole.