The profile of high profile circular arc tooth synchronous belt has the following main features compared with the profile of traditional circular arc tooth synchronous belt:

(1) The tooth height of the synchronous belt is 14.75% higher than that of the traditional STPD arc tooth, which increases the contact area and meshing pressure Angle between the belt tooth and the tooth, thus improving the bearing capacity of the synchronous belt under the condition of constant unit bearing strength;

(2) The synchronous belt tooth height is 6.06%larger than the gear tooth height, which is used to reduce the pressure between the belt tooth groove and the top of the gear tooth, improve the wear state between the belt teeth and the stress state of the bearing layer, and improve the life of the belt;

(3) The tooth top of the synchronous belt is opened with four slots, which can exclude air when the belt engages with the wheel and reduce noise. At the same time, the body groove can also deform the top part of the tooth, forming an elastic tooth top, reducing the meshing impact and improving the meshing state.