As the temporary public conveyance for the particular people,the rental wheelchair has certain market demand and designing prospect.After analyzing the different characters of user group in human factors,four design factors were extracted,folding,general-utility,simplicity and durability.And based on Ergonomic analysis of the sedentary posture size,a new kind of folding rental wheelchair has been designed.Then,establishing structure dimension,material,processing technology and using the engineering software,a small model has been made by rapid prototype manufacturing,which has been identical with the fist design factors.The emergence of the rental wheelchair is a concept of the wheelchair produces change,pregnant with the infinite vitality and unlimited business opportunities.