Aircraft height-increasing undercarriage capable of being controlled to be folded and unfolded

The invention discloses a controllable retractable heightening undercarriage of an aircraft, and belongs to the technical field of aircraft accessories. In order to solve the problems that an existing product is inconvenient to use and equipment is prone to being subjected to rigid impact in the landing process, the following technical scheme is provided, the device comprises a suspension support and a fixing foot stool, and a main support used for amplification is installed at the bottom of the suspension support. The main support is loaded with the suspension support and the fixing foot stand, so that the main support is assembled with an existing undercarriage, then the undercarriage is expanded through cooperation of the locking assembly and the folding and unfolding assembly, and then the height is increased on the basis of an original fixed undercarriage; according to the unmanned aerial vehicle, the mounting space is expanded, the bottom loading space is in an unshielded state under the take-off state