The walk-behind electric micro-tiller features electric reversing and speed regulation functions, which simplifies the complexity of mechanical configuration. However, the control interface design of handlebars on conventional walk-behind diesel micro-tillers currently available in the market fails to meet user demands. This paper focuses on redesigning the control handlebar through fully electronic control system. It systematically analyzes the operational characteristics of micro-tillers and required functional implementations, conducts ergonomic design of handlebar components, and evaluates the human comfort of button layout, function integration, and handlebar configuration. Through human factors engineering simulation and optimization using JACK software, a new optimized design scheme is determined to effectively satisfy ergonomic technical requirements.