The present invention relates to the technical field of conveyor equipment, and specifically to a synchronous conveying chain plate conveyor which is capable of realizing synchronous conveying of two conveyor lines and ensuring reliable conveying. The synchronous conveying chain plate conveyor comprises two conveyor frames arranged in parallel. Each conveyor frame comprises a middle bracket and lateral bracket at two sides. Two driving chain wheels arranged in parallel are mounted on one lateral bracket, while two driven chain wheels corresponding to the driving chain wheels are mounted on the other lateral bracket. The two driving chain wheels and the two driven chain wheels are both connected by means of connecting rod shafts. On the two conveyor frames, the driving chain wheels are connected by intermediate shafts, and the driving chain wheels and the driven chain wheels are connected by means of chains, and connected to a transmission device; chain plates are mounted on the chains; guide plates are mounted symmetrically at outer lateral parts of the chain plates and at two sides of the middle bracket; a row of guide pulleys is mounted at an inner side of each guide plate; a front end of each guide plate is a slope tilted outwards; and a movable limiting baffle plate is disposed at a tail end of each guide plate.