KC01 is an electric vertical take-off and landing (VTOL) fixed-wing drone system developed by our company. It is designed with fixed-wing and four-rotor composite wing. It solves the problem of VTOL of fixed-wing drone in a simple and reliable way. It has the characteristics of long flight time, high speed, long distance and the function of VTOL of rotary-wing drone. At present, that main application are as follows: Armed police border patrol, land and resources survey, highway monitoring, public security arrest patrol, holiday traffic monitoring, fire search and rescue, forestry patrol, power line, oil pipeline patrol, and so on.