In this paper, we investigate wireless information and power transfer in full-duplex (FD) two-way massive MIMO amplify-and-forward (AF) relaying network. In the considered network, the relay is an energy demander and applies time switching scheme to harvest energy from the users for amplifying and forwarding the users' signals. Different from prior studies, MIMO users and antenna correlation are considered. Achievable sum-rate is analyzed and the impact of antenna correlations is discovered. It is revealed from the analysis that the transmission power at the MIMO users can be cut down proportionally to 1/M, and/or the transmission power at the relay can be scaled down proportionally to 1/M,2 to maintain a constant sum-rate, when massive antennas are equipped at the relay. Here Mr denotes the number of antennas at the relay. Moreover, the optimal time switching ratio for energy harvesting at the relay is found to maximize the sum-rate. Finally, the analytical results are validated by computer simulations.