The invention discloses an escape device for a straddled-type monorail vehicle. The escape device comprises a monorail vehicle bottom platform. A skirt plate framework (33) is arranged under the monorail vehicle bottom platform. A rotary shaft (2) is arranged on the lower end face of the monorail vehicle bottom platform (1). One end of the rotary shaft (2) is connected with the monorail vehicle bottom platform (1) or the skirt plate framework (33). The rotary shaft (2) is provided with a folding ladder (3). The escape device has the advantages of being ingenious in structural design, convenient and reliable to use and low in cost. With the adoption of the escape device, the folding ladder can be unfolded fast and conveniently, people on the vehicle can be transferred to a safe area efficiently, fast and safely, and thus security accidents are prevented.