1, in the installation and design of the pipeline, as far as possible to avoid the 90 ° and S-bend to reduce the resistance of pumping concrete to prevent blockage. 2, in order to ensure the continuity of pumping concrete work, to ensure the quality of concrete pouring, homework should not be too long in order to prevent clogging. If for some reason a long time interval, it should be about every 5 ~ 10min start a pump or anti-positive pump several times to prevent clogging. 3, pumping concrete should be strictly in accordance with the provisions of pumping concrete design mix, strict control of slump. 4, the choice of aggregate size must meet the requirements, generally should not be larger than the delivery diameter of 1/4. 5, the application of water before pumping concrete lubrication pipeline, first to send mortar, after the concrete sent to prevent clogging. 6, in the hot summer, the wet grass bag should be used to cover the pipeline to prevent the pump in the process of concrete collapse caused by excessive tube plugging.