The invention discloses a measurement point arrangement method for bridge dynamic load tests. The method includes the steps of (1) establishing a finite element model of a target structure on a finite element platform; (2) extracting a target modality vibration-style matrix according to the finite element model; (3) removing unsuitable nodes in the target modality vibration-style matrix, and forming primary freedom degrees; (4) calculating the MAC matrix of two nodes of any combination one by one from the primary freedom degrees; (5) selecting N groups of nodes with the smallest maximum non-diagonal element value; (6) selecting two optimal nodes from the N groups of nodes to enter the measurement of the freedom degrees; (7) selecting one node from the remaining nodes of the primary freedom degrees one by one to enter the measurement of the freedom degrees; (8) obtaining calculating results. The measurement point arrangement method for bridge dynamic load tests combines the finite element analysis technology, is based on the structure dynamic measurement point selection theory, and aims at the target modality of a target bridge to make analysis quick and accurately, and the measurement point arrangement position along the longitudinal or plane distribution of the bridge is obtained; the method is simple and efficient, the collected signals are more representative, and the identification ability of the bridge transverse target modality is improved.