The invention discloses a continuous variable quantum key distribution data coordination FPGA heterogeneous acceleration method, which solves the parallel acceleration problem of the SEC (slice error correction, spline error correction) protocol for data coordination in the CV-QKD system. The SEC protocol adopts multiple Level decoding method, LDPC decoding is performed at each level, and the decoding algorithm adopts logarithmic domain decoding. The parity check matrix of the LDPC code is a random sparse matrix, and decoding requires multiple BP (Belief Propagation) information iterations to correct the wrong code. The check matrix of the LDPC code used in the data coordination of the CV‑QKD system is large in scale, reaching 200,000 x 200,000, which makes storage difficult, decoding speed is very slow, and the system time is prolonged, which affects practicability. This program adopts the processing mode of CPU+FPGA heterogeneous computing based on OpenCL, parallelizes the LDPC decoding process, and proposes a static cross bidirectional circular linked list to store the check matrix of huge LDPC codes, thereby improving the The rate of the entire data coordination scheme.