The invention discloses a basic security service engine of cloud computing center. An electric connecting seat and an electric connecting head connected with engine equipment are included, the electric connecting seat is provided with a sliding cavity, the right sidewall of the sliding cavity is provided with a connecting groove with a rightward opening, a sliding block which penetrates the connecting groove and extends out of the right sidewall of the electric connecting seat is installed in the sliding cavity in a sliding way, the left sidewall of the sliding block is internally provided with a first rotating cavity, a bushing is rotatably mounted in the first rotating cavity via a bearing, the bushing is internally provided with a first screw hole with a leftward opening, a first screwrod is installed in the first screw hole cooperatively, the left end of the first screw rod is in power connection with a driver fixedly arranged in the left sidewall of the sliding cavity, a second rotating cavity which penetrates the first cavity is arranged in the sliding block in a top-down extending way, and the outer circumference of the bushing is fixedly provided with a first tooth-shapedwheel which extends into the second rotating cavity.