The utility model relates to a construction machinery installs technical field, especially relates to a turnover formula keeper. This turnover formula keeper includes: fastener, the first portion of bolt and bolt second portion, the fastener includes first buckling parts and second buckling parts, fixed connection can be dismantled with the second buckling parts to first buckling parts, and forms the installation through -hole between first buckling parts and the second buckling parts, the first portion of bolt with first buckling parts fixed connection, just the axial direction parallel of the first portion of bolt in the axial of installation through -hole, the first portion of bolt is a bolt sleeve section of thick bamboo, bolt second portion is pin shaft, or, the first portion of bolt is pin shaft, bolt second portion is a bolt sleeve section of thick bamboo, a bolt sleeve section of thick bamboo with pin shaft can cooperate the grafting. The utility model aims to provide a turnover formula keeper to solve between the keeper that exists and the gatepost technical problem that difficulty and gatepost turnover inefficiency were dismantled in the installation among the prior art.