Inclined track lifting roadway is indispensable to mine transport.During inclined roadway transportation,tramcar derailing accident due to overloading lifting,improper operation,quality of tramcar and so on frequently occurres.If a sensitive and reliable derailing protect device is installed for inclined roadway transportation,the loss caused by tramcar derailing accidents can be reduced to the minimum extent.A new type of intelligent automatic brake has been developed and designed,it is simple in structure,safe and reliable in operation,strong in resolving braking performance and flexible in use,is of important practical significance to the safety guarantee of inclined roadway transportation.