The use of 1. roller before use should be carefully checked whether the appearance of serious damage phenomenon and supporting a bump, belt conveyor, roller rotation should be flexible rotation, no jam. The installation distance of 2. idlers should be determined according to the type of logistics and the characteristics of the conveyor, and the size of the traffic volume should be determined by scientific calculation, so as to avoid the installation of too sparse or too close. 3. roller installation should be adapted to avoid mutual grinding collision. Two, belt conveyor roller maintenance, 1. roller normal service life of more than 20000h, generally need no maintenance. But according to the size of the use of the site and load, should develop the corresponding maintenance date, timely cleaning oil filling repair, clean up floating coal in time. The idler with abnormal sound and no change should be replaced in time. 2. when changing the bearing, the bearing cage must be opened outwards, and the bearing should be kept in proper clearance after loading into the idler, so the bearing cage should not be crushed. 3. labyrinth sealing parts should be used in the original parts, should be installed separately in the idler, not assembled together. 4. the use of idler rollers, should prevent heavy objects hit the roller tube body. 5. in order to ensure the sealing performance and use performance of roller, it is forbidden to disassemble idler roller at random.